The present application claims priority to the United Kingdom Patent Application Serial Number GB 1718350.0, filed 6 ^th November 2017 entitled "Downhole Pipe Disposal Spear," whereby the present invention generally relates to using a spear to significantly improve compaction efficiency over longer lengths during downhole pipe disposal within a subterranean bore.

FIELD

The present invention generally relates to method and apparatus for forming a spearhead on an end of a cut length of coupled pipe and using the spearhead to urge an upper cut length laterally and substantially adjacent to at least the next lower cut length within a subterranean bore. A spearhead can be fabricated downhole with in- situ materials or fabricated above ground and hafted to a cut length of pipe using various prior art linkage member mechanisms to provide interoperability between a cut length, its spearhead and the target of the spearhead. Various prior art tools can provide the invented spearhead and its associated haft by cutting subterranean in-situ coupled pipe. After hafting a stack of one or more spears and at least one target cut length, opposing material contacts and friction will generally block gravitational downward movement or locomotion of pipe within the bore, whereby a force- transferring cut length cross-section can limit kinetic buckling within the stack to avoid yielding and catastrophic folding to, in use, urge cut lengths laterally and substantially adjacent to each other and, thus, greatly improve unobstructed bore space creation over longer lengths of coupled pipe. The present invention's spearhead force focusing edge can be urged axialiy downward to further split force-transferring cross- sections of opposing cut ends, or lower spearhead hafts, to: limit kinetic buckling, avoid yielding catastrophic folding and overcome material and frictionai contacts previously preventing or limiting downward pipe disposal compaction of in-situ pipe within a subterranean well. in comparison, prior art in the field maximises compaction over relatively shorter lengths by substantially weakening, "plastic yielding buckling" and catastrophically folding and crushing, pipe into a subterranean bore. Typically, prior art maximises compaction efficiency using "more" weakening to produce higher compaction ratios over a shorter lengths closer to applied force; whereas, the present invention uses the contrary approach of using "less" weakening to form cut lengths with force- transferring cross-sections to limit buckling to "elastic yielding" and, thus, avoid friction associated with catastrophic folding and cross-bracing to, in use, transfer compaction force farther from the point of application using a spearhead's force focusing edge to further split or split and swallow another cut length of pipe to improve the predictability and compaction efficiency over a longer subterranean bore length of equivalent diameter. The present invention can use prior art including various aspects of prior art compaction and fishing tools, albeit in a contrary manner, to provide significant improvements over prior art that can replace or enhance prior art compaction.

BACKGROUND

The social and business cost of offshore well plug and abandonment (P&A) is extreme, whereby there is a substantial worldwide need for cost reduction. For example, "UK taxpayers are facing a £24 billion bill for decommissioning that threatens to wipe out the remaining value of UK North Sea oil and gas," as recited by the Financial Times in 2017. About 47% of decommissioning costs are well plug and abandonment, so over £1 1 billion of the 2017 estimated cost is attributable to well P&A. Considering that actual versus estimated costs can commonly escalate from 150% to 354%, the UK Oil and Gas Authority's June 2018 P&A estimate was about £18 billion to £47 billion remaining cost for UK well decommissioning. Such high costs are difficult to understand because well P&A is no more than pumping cement into a hole-in-the-ground. Unfortunately, the majority of cost for offshore P&A is not for cement plugging but, instead, relates to the offshore logistics. This fact is easily demonstrated by comparing relatively inexpensive "onshore P&A" to very expensive "offshore P&A," for similar well architectures. The use of offshore drilling rigs can account for 40% to 70% of the estimated offshore well P&A cost. Accordingly, a significant business and social need exists to replace present offshore drilling rig P&A with substantially lower cost compaction P&A that can be carried out alongside other decommissioning activities. Offshore work can be risky with respect to safety and environment, whereby compaction P&A is safer and more environmentally friendly than drilling rig P&A, because it is performed by fewer people protected by more barriers using conventional decommissioning logistics with less environmental impact. Consistent with social and industrial need for keeping risks as-low-as-reasonably-practical (ALAEP) conventional rig-less logging tools can measure in-situ cement bonding and place the same or better P&A plugs to provide the same or improve upon a drilling rig P&A scope-of-work. Accordingly, the present invention's improvement over prior art can provide additional social, environmental and economic benefits.

[0009] A significant economic and social need exists for simpler and improved compaction of all or portions of pipe or completion apparatuses in a well, wherein a spearhead of the present invention can be formed by prior art apparatuses and methods using a downhole coupling between pipe bodies comprising, e.g., a buttress, integral, premium, or another coupling or completion apparatus with a larger diameter and/or thicker wall than the pipe body it couples comprising, e.g., a subsurface safety valve, nipple profile, sliding side door, injection subassembly, gas lift mandrel, circulating ports, blast joints, or other casing or completion apparatuses with a larger diameter and thicker wall that can provide a force focusing edge of a spearhead.

[0010] The present invention can reduce or remove the prior art compaction P&A need to substantially weaken, cut and split in-situ pipe because less cutting is needed to form a force-transferring cross-section of cut length that can limit kinetic elastic buckling to avoid prior art plastic yielding catastrophic folding and compressive cross bracing causes of unyielding frictionai contacts between compaction members, whereby a stack of the present invention's cut length hafted spearheads can be urged downward and use the force focusing edge of a spear end to split cut ends and/or move a cut length laterally adjacent to the next lower cut length within a subterranean bore to provide the benefit of more predictable compaction over a longer length.

[0011] While the present invention can be used for P&A to significantly improve prior art of the present inventor and others, it is also usable within any application that requires permanent or temporary downhole disposal of a tubular pipe within a bore comprising, e.g. temporary abandonment, slot recovery and/or well side-tracking. Prior art neighbouring the present invention includes the lessons of: Document Rev. Date Inventor Topic

US 1,599,067 A 05/1922 Segelhorst Fishing Tool,

US 2,680,483 A 06/1954 Le Bus Over-shot

US 4,352,397 A 10/1982 Christopher Severance,

US 5,242,201 A 09/1993 Beeman Spear / Over-shot,

US 5,509,480 A 04/1996 Terrell et al. Chemical Cutter,

US 5,690,170 A 11/1997 Hailey et al. Cutting Over-shot,

US 5,924,489 A 07/1999 Hatcher Severance,

WO2012/094322 A2 07/2012 Bowersock, et al. Over-shot,

US 2012/0111556 Al 05/2012 Palmer, et al. Spear & Method,

GB 2484166 B 11/2012 Tunget Rigless P&A,

US 8,528,630 B2 09/2013 Tunget Crushing,

GB 2487274 B 03/2013 Tunget Space Provision,

GB 2492663 B 01/2014 Tunget Deformed Bore,

US 2015/0034321 Al 02/2015 Thomas et al. Spear & Method,

GB 2515858 B 10/2015 Tunget Axial Cutting,

GB 2506235 B 07/2017 Tunget Cultivate Surface.

Additional prior art includes: American Petroleum Institute (API) specifications 5C3, 5C5, 5CRA, 5CT, 5 DP and 5 ST associated with Oil Country Tubular Goods (OCTG) and the Society of Petroleum Engineer's (SPE) 2006 SPE 104267 publication of Mitchell entitled "Tubing Buckling - The State-of-the-Art." The closest neighbouring prior art comprises lessons of the present inventor and lessons of Hatcher and, with varying degrees of relevancy, other prior art cited above. Whether the cited prior art, or other similar prior art, is considered in isolation or combination, it is silent to splitting of a pipe to increase column bending strengths to form a cut length with a force-transferring cross-section that reduces buckling and folding compaction friction, or a spearhead on the end of a cut length of coupled pipe to kinetically split or swallow another cut length of pipe to, in use, reduce compaction force and dispose one relatively unbuckled cut pipe section adjacent to another. Accordingly, the present invention is distinctly distinguished from prior art and can provide the significant improvements of lower compaction forces and more consistently significant compaction efficiency over longer compaction lengths to substantially increase the amount of space created for cement bond logging and placement of a supported cement P& A plug to keep risks ALARP. When comparing isolated or combined prior art lessons to those of the present invention, it is important to realise that compacting tubular pipe material is entirely dependent upon a very limited and confined downhole subterranean cylindrical bore space and, thus, it is obvious that including stronger cut length pipe cross-sections or adding material, e.g. a surface fabricated spearhead, which require more space and are unlikely to be compacted, is contrary to the intent of maximising compaction. Accordingly, it is not obvious why any skilled person would consider combining the lessons of, e.g., the present inventor, Hatcher, or references similar to those cited above, or consider increasing required yielding strength at the point of applied force, or use couplings that are difficult to cut and unlikely to be compacted or pass another coupling within a subterranean bore, or increase the amount of material being compacted by adding a spearhead and, thus, arrive at the present invention. It is also important to realise that combining lessons taught by, e.g., the present inventor and Hatcher would seem neither practical nor obvious to those skilled in the art since, within the limited space of a subterranean bore, two in-situ cut lengths of pipe: a) can have conflicting diameters opposing each other, b) that are unlikely to pass each other, even when severed at an angle, c) whereby angled severance can have highly factional angled surfaces resisting sliding across the severance, d) with the opposing diameters and materials of both in-situ cut length pipe bodies being the same and deforming equally to buckle and plastically yield around the pseudo-hinge of severance to cross-brace and, thus, e) provide no obvious benefits over prior art philosophies of cutting pipe to maximise plastic deformation and, thus, compaction. Whether you are skilled or unskilled in the art, it is obvious that increased cutting and additional weakening of tubular pipe sections can better plastically deform and crush to, thus, maximise compaction, whereas it is not obvious how providing fewer cuts and stronger force-transferring cross-sections of pipe cut lengths more resistant to buckling could be used to reduce required compaction forces and provide more consistently significant compaction efficiencies, which provide the conundrum of being less efficient over shorter lengths but more efficient over longer lengths. A subterranean bore is typically referred to as being "downhole." As downhole coupled pipe materials are typically API specification premium steels with high yield strengths and significant wall thicknesses, actual scale compaction experiments are preferable to laboratory experiments; however, actual scale experiments provide limited experimental data during compaction since it is not possible see thru casing required to contain the compaction process. Laboratory scaled model experiments using, e.g., see-thru glass or plastic containment can only provide theoretical results because very small differences can cause large deviations when attempting to model the inevitable plastic yielding of high yield strength steels and, thus, laboratory experiments may not represent a true compaction environment. Accordingly, it is not obvious why those skilled in the art might experiment with providing fewer cuts and stronger pipe sections given the limited data and expense of real scale experiments when, by way of example, it is obvious that the more you cut a hollow object, like a pipe, a ball or an egg, the smaller the space its cut shell fits into. Accordingly, it is not obvious why those skilled in the art might combine prior art or experiment with methods that appear unlikely to maximise compaction between coupled pipe lengths, nor is it obvious why those skilled in the art might experiment with cutting couplings or adding spearheads that are unlikely to be compacted or pass another coupling or spearhead within a subterranean bore to arrive at present invention. Also the oligopolistic sendee market performing work within the art is not financially incenti vised to perform experiments unless paid for by customers who can be unskilled in the art of yielding steels or unable to foresee the potential success of such experimentation. Accordingly, the surprising discover)' found by the present inventor is taught herein. Those skilled in the downhole arts recognise that no two downhole jobs are exactly alike but a large proportion within each particular downhole art are similar. Someone skilled in a downhole art will draw from the experience he or she has gained on each job within their specialised art, but they are unlikely to have experienced many downhole jobs outside of their area of expertise and, thus, it is important to teach what might seem obvious to those unskilled in downhole art after it is taught, but is unlikely to be obvious those skilled in a particular art because they are unaware of the needs of the different and possibly contrary art in which their skills may be used. The present invention can use prior art and conventional downhole tools to construct the present invention's spear from in-situ pipe, inclusive of associated couplings and/or completion apparatuses. Various above cited and similar prior art teach various aspects of prior art downhole fishing with visual similarities of tool shape that can be usable with the present invention, albeit downhole fishing to free and retrieve coupled pipe from downhole confinement is contrary to the purpose of downhole pipe disposal.

[0020] Any object dropped or stuck in a well that interferes with normal well operations is commonly referred to as a "fish," whereby such items are "fished" from the well to continue normal operations, whereby removing interfering objects from the invisible depths of a well is commonly called "fishing," As may interfering objects within a well are created during pipe operations, the art of "fishing" can also be referred to as "pipe recovery." Also, the art of fishing can also refer to retrieval of slick line, electric line, coiled tubing and/or broken or non-operational down tools which interfere with normal operations. An inability offish" objects dropped or stuck in a well can lead to plugging and abandoning a well portion where the objects have dropped or are stuck and can be followed by side-tracking, whereby the present invention can be usable to compact tubulars to allow side-tracking at deeper depths,

[0021] Fishing jobs are typically classed as open hole fishing or cased hole fishing, whereby the present invention can apply after the failure of either. There are numerous kinds of fishing involving the retrieval of interfering objects, which can be referred using various technical jargon including: wash-over, over-shot and/or spearing.

[0022] The present invention does not "fish" or retrieve but, rather, leaves and compacts a "fish" comprising, e.g. coupled couple pipe that can, e.g. have wireline fishes therein, within either cased or open hole, to provide addition bore space unobstructed by the "fish." Contrar)' to the purpose of a "fishing spear," aspects of the present invention use a spear to compact debris further into a bore of either cased or open hole to facilitate further operations, like P&A or side-tracking.

[0023] Subsequent to a failed fishing job or during P&A of a production well, the present invention can use various simple and complex cutting and fishing tools as a hafting tool for forming a spearhead and cut length of pipe hafted to the spearhead.

[0024] Most fishing tools are designed to go over and around or within the internal diameter of a pipe fish to pull it from the well and, thus, typically have tight tolerances between a fishing tool and pipe. Contrary to the art of fishing, aspects of the present invention seek much larger tolerances between each of the cut lengths, spearheads and the bore to minimise friction when compacting and wedging one cut length adjacent to an opposing deeper cut length in a confined bore. The present invention can cut and split or swallow tubuiars "during compaction," whereby a force focusing edge is used for plastic yielding material contacts blocking downward movement or locomotion, wherein splitting cutting or displacing a force transferring cross section, which can be free standing within the bore, can be used to avoid catastrophic folding of the next lower cut length, which can be the haft of another spear. Using the spear and associated spearhead's force focusing edge to axiaily cut and split and/or laterally move and split cross sections of pipe during compaction is not generally feasible in prior art compaction because weakened cross sections plastically fold when confronted by a force focusing edge. Less weakening can improve force transfer over a longer length in contrast to prior art's more weakening compacti on over a shorter length closer to force application. For example, the present invention can compact a pipe length with four or five couplings to provide an industry compliant 100-ft (30.5-m) unobstructed bore length in a single compaction, whereas prior art compaction is likely to require more compactions because buckling and folding adjacent to the point of force application causes friction that limits force transfer beyond the next coupling. Also, an urging tool reduces the resulting space unobstructed by pipe for each compaction. Accordingly, the present invention can provide the benefits of reducing personnel and equipment usage and costs of compaction using a more predictable method and apparatus usable over longer bore lengths to reduce the economic and social cost of P&A with a rig-less method not requiring high cost drilling rigs. Another aspect of the present invention provides the significant benefit of a force- transferring cross-section of pipe hafted to a force-focusing edge to provide an additional failure mode of spearing splitting during compaction. This additional aspect reduces the propensity of catastrophically folding, bird-nesting, rolling, plastically yielding or substantially bending of cross sections across a bore to form cross-braces across the bore that substantially act like trusses on a bridge to increase resisting friction to ultimately stop compaction after a number of successive folds. [0027] The present invention provides maximum cost saving benefit within an rig-less environment, however the present invention can also provide the benefit of compaction within a drilling rig environment where substantial available resources like pumps and heavy fluid capabilities can aid compaction. For example, a drilling rig cannot work without removing production barriers to install its blowout preventers (BOP). The present invention can work thru in-situ well control with a wireline BOP from a drilling rig to plug a lower end of the well so that a drilling rig can remove the production barriers with risks ALARP and install the rig's BOP before, e.g., sidetracking or fishing compacted pipe to restore well functionality.

[0028] The present invention can benefit any application than needs to remove pipe obstructing an interval of a subterranean bore to at least temporarily create a space to facilitate side-tracking to a lateral bore, perform cement bond logging, place plugs and/or dismantlement surface production barriers according to present regulatory requirements and industry best practice to keep cost, social and environmental risks and industrial legal liabilities associated with leakages from a plugged well ALARP.

[0029] Accordingly, need exists for more efficient rig and rigless compaction of tubulars into lower unneeded portions of a well or portions where compaction can be fished from the well. Various aspects of the present invention address at least some of these needs.

SUMMARY

[0030] Accordingly, preferred embodiments of the present invention provide method and apparatus for forming a haft of a spear from a cut length of coupled pipe with a spearhead on the pipe's end, whereby the resulting spear's head and associated haft length of cut pipe can be urged laterally and substantially adjacent to the targeted next lower cut length of coupled pipe within a subterranean bore, wherein single or multiple spears can be stacked on at least one cut length of pipe.

[0031] Consistent with its ordinary meaning, a hafting tool provides a haft with a force focusing edge of a spearhead, whereby preferred hafting tool embodiments can be any tool usable to attach or form a spearhead or split or cut pipe thru the proximaliy circular passageway of pipe hanging within a confined proximaliy cylindrical space of a subterranean bore. Any number of hafting tools can be useable or adaptable to perform an amalgamation of hafting operations that selectively split the pipe's wail at least twice to selectively form a plurality of force-transferring cross-sections of pipe cut lengths with spearheads on lower facing cut ends opposing upward facing cut ends. At least one cut length force-transferring cross-section haft of a spear and one force- transferring cross-section of cut length pipe can form a plurality of stacked cut lengths, wherein preferred embodiments of a hafting tool can haft a spearhead with a force focusing edge onto all but the uppermost hanging end of lower facing cut ends within the stacked plurality of cut lengths of pipe. Preferred embodiments use an urging tool thru the pipe's passageway and uppermost hanging end to engage and move an upward facing cut end of a spear haft forming part of the plurality of cut lengths. Opposing cut length cut ends can have material and frictional contacts between members of the stack of free standing cut lengths and bore that block gravitational movement of one cut end substantially past an opposing cut end. Preferred embodiments can use an urging tool to move a force transferring haft cross section associated with the spearhead's force focusing edge axialiy downward to further split a force-transferring cross-section of upward facing cut ends opposing the spearhead to, in use, limit kinetic buckling to avoid catastrophic folding and overcome the material and frictional contacts between members of the selectively formed stack of spears and cut lengths within a bore, wherein moving at least one stacked spear laterally and substantially adjacent to the next lower cut length of pipe within a confined subterranean bore can compact the coupled pipe within the bore. Various embodiments can split: transversely, longitudinally, angularly, helically and/or spirally split targeted pipe by: cutting, shearing, tearing and/or disposing and separating whole or previously split pipe wall thicknesses and/or swallowing at least part of a next lower cut length's pipe wall. Other embodiments can use interoperability between a systematic amalgamation of members of at least one hafting tool to selectively: haft and split a coupled pipe to expose an edge of a coupling to form a force focusing edge and cut length haft, and/or haft a passageway deployed above ground fabricated force focusing edge to form said spearhead with a linkage engagement to a lower facing cut end. Related embodiments can transversely expansion an above ground fabricated spearhead to an effective diameter greater than the passageway' s internal diameter,

[0037] Various further related embodiments can use an above ground fabricated spear with :

cutting, frictional, penetrating, slippage, serrated, segmented, mandrel, receptacle, pinned, screwed, slotted, or combination thereof, linkages mechanisms to penetrate and/or grip outer surfaces of a wall to at least partially maintain the lower facing end opening of the inner passageway swallowing disposal of a cut length therein.

[0038] Other embodiments can split at least part of a pipe' s wall thickness to form cut lengths of: circumferentially whole and/or circumferentially split cross sectional areas limiting column, sinusoidal and helical kinetic buckling to an elastic bending range to avoid plastic yielding and catastrophic folding with associated cross bracing within the subterranean bore.

[0039] Still other related embodiments can us an urging tool with travelling valves harnessing the cyclical nature of the elastic yielding range associated with limited kinetic buckling to further kinetically and cyclically move a spearhead more substantially lateral and adjacent to a next lower cut length.

[0040] Various embodiments can use friction reducing fluids pumpable thru the coupled pipe before or after hafting a plurality of cut lengths to reduce friction associated with splitting a pipe' s wail and/or urging a cut length to further limit kinetic buckling and associated material yielding.

[0041] Other embodiments can haft a cut length and spearhead to form a spear using: mechanical, abrasive, chemical, explosive, pyrotechnic and/or laser, cutting member mechanisms of a hafting tool.

[0042] Still other embodiments can move a spear to further split a force-transferring cross- section of upward facing cut ends by accelerating mass of the spear axially downward using energy associated with moving an urging tool with: mechanical, hydraulic and/or explosive, means of locomotion.

[0043] Various other features of the present invention are further described in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Preferred embodiments of the invention are described below by way of example only, with reference to the accompanying drawing Figures (Fig.) in which:

[0045] Fig. 1 depicts a cross sectional diagrammatic elevation view of various features of a subterranean bore and embodiments (A) to (T) of the present invention, wherein half and quarter cross-sections are shown for the well and pipe, respectively.

[0046] Fig. 2 illustrates a subterranean bore diagrammatic cross sectional elevation view taught by Hatcher in the above cited prior art US 5,924,489.

[0047] Fig. 3 shows quarter cross sectional elevation views of various aspects of OCTG coupled pipe usable to form proximallv circular passageways and cylindrical spaces.

[0048] Figures 4 to 6 depict diagrammatic cross sectional plan views of cut OCTG outside diameter (OD) tubing coupled pipe within casing couple pipe of: 3.5 inch (88.9 mm) within 9.625 inch (244.6mm), 4.5 inch (114.3mm) within 7 inch (177.8mm), and 5.5 inch (139.5mm) within 9.625 inch (244.6mm), respectively.

[0049] Fig. 7 illustrates a cross sectional diagrammatic elevation view across a subterranean bore of prior art angled showing cross-bracing of opposing pipe bodies.

[0050] Fig. 8 shows a diagrammatic view of a prior art process and system for catastrophically folding split pipe to achieve compaction.

[0051] Fig. 9 depicts a cross sectional diagrammatic elevation view thru a subterranean bore illustrating kinetic buckling and friction associated with embodiments (A) to (T) of the present invention in comparison to prior art catastrophic folding.

[0052] Fig. 10 illustrates a diagrammatic cross sectional slice thru a subterranean bore of embodiment (A) of the present invention.

[0053] Figures 1 and 12 show a diagrammatic elevation cross section thru a subterranean bore and a hypothetical elevation view, respectively, of prior art methods.

[0054] Fig. 13 shows a prior art graph of stress and strain relationships comparing OCTG yiel ding of prior art catastrophic folding and the invented embodiments ( A) to (T).

[0055] Figures 14 and 15, respectively, depict diagrammatic views of embodiments (B) and (C) of the present invention. [0056] Fig. 16 is a graph of applied bore piston pressure versus the percent compaction efficiency for prior art catastrophic folding compaction compared to spear compaction embodiments (D) and (E) of the present invention.

[0057] Figures 17 to 19 depict an elevational cross sectional slice thru a subtenanean bore in two different directions for spear embodiment (F) of the present invention, wherein each of Figure has a break-out portion revealing inner component surfaces.

[0058] Figures 20 to 24 illustrate cross sectional elevation views thru a subterranean bore of embodiments (G) to (K) of the present invention, respectively, wherein various breakouts reveal inner component surfaces.

[0059] Figures 25 and 26 show diagrammatic plan and elevation cross sections thru different subterranean bores for embodiments (L) and (M), respectively, to illustrate splitting and swallowing spear compaction.

[0060] Figures 27 and 28, respectively, depict plan and elevation cross sectional views thru similar subterranean bores of embodiments (N) and (O), respectively, illustrating separationai disposition splitting spear compaction.

[0061] Fig. 29 illustrates an elevation diagrammatic view of embodiment (P) explaining various possible features of the present invention.

[0062] Fig. 30 shows left and right elevations cross sectional views before and during urging thru a well's various subterranean bores for invented embodiment (Q) .

[0063] Figures 31 and 32 depict diagrammatic plan cross section and related elevation cross- section of embodiment (R) of the present invention.

[0064] Figures 33 and 34 illustrate isometric views of spearhead embodiments (S) and (T).

[0065] Embodiments of the present invention are described with reference to these Figures.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0066] Before explaining selected embodiments of the present invention in detail, it is to be understood that the present invention is not limited to the particular embodiments described herein, and that the present invention can be practiced or carried out in various ways. The disclosure and description herein is illustrative and explanatory of one or more presently preferred embodiments and variations thereof. It will be appreciated by those skilled in the art that various changes in the design, organization, order of operation, means of operation, equipment structures and location, methodology, and use of mechanical equivalents may be made without departing from the spirit of the invention.

[0067] As well, it should be understood that the drawings are intended to illustrate and plainly disclose presently preferred embodiments to one of skill in the art, but are not intended to be manufacturing level drawings or renditions of final products and may include simplified conceptual views for easier and quicker understanding and explanation. As well, the relative size and arrangement of the components may differ from that shown and still operate within the spirit of the invention.

[0068] Moreover, it will be understood that various directions such as "upper," "lower," "bottom," "top," "left," "right," and so forth are made only with respect to explanation in conjunction with the drawings, and that the components may be oriented differently, for instance, during transportation and manufacturing as well as operation. Because many varying and different embodiments may be made within the scope of the concepts herein taught, and because many modifications may be made in the embodiments described herein, it is to be understood that the details herein are to be interpreted as illustrative and non-limiting,

[0069] it will also be understood that illustrative embodiments (A-T) represent the set of embodiments (A), (B), (C), thru (T) wherein, e.g., (1A-1T) represent a method embodiment set (1) with member embodiments (1 A), (IB), (1C) thru (IT). Also, e.g., illustrative method embodiment set (1) members (1A-1T), apparatus embodiment set (2) members (2A-2T) and associated feature embodiment sets (3) to (16) with members (3A-16T) are inclusive of members (3A-3T), (4A-4T), ... (16A-16T) and, e.g., also inclusive of sub-members (3A1-3A3), (3B 1-3B3), ... (3T1 . . .3T3) thru (16A1-16A3), (16B1 -16B3), thru (16T1-16T3). Also, various feature references like, e.g., strata (36) are inclusive of the variations of strata (36.1-36.5). Accordingly, embodiment sets of method ( 1) and spearhead (2) apparatus usable on hafted (7) pipe cut lengths (3) of coupled (4) pipe (5) for urging (13) a cut length of spear (16) laterally adjacent to the next lower cut length within a subterranean bore (6), with associated illustrative features taught herein, can comprise a set of embodiments (1A-16T) substantially as described hereinabove with reference to Figures 1, 9 and 13; 10; 14- 15; 16; 17-19; 20-29; 30; 31-32; and 33-34, respectively, of: embodiments (A-T); embodiment (A); embodiments (B-C); embodiments (D-E); embodiment (F); embodiments (G-P); embodiment (Q); embodiment (R) and embodiments (S-T) of the accompanying drawings.

[0070] Referring to Figures 1, 9-10 and 13-34, wherein the present invention's method (1) embodiments (1A-1 T) of using a hafting tool (7) embodiment (7A-7T) thru proximally circular passageway (8) embodiments (8A-8T) to selectively target and haft a wall (10) split (15) embodiment (10A-10T, 15A-15T) in a coupled (4) pipe (5) embodiment (4A-4T, 5A-5T), at least twice, to selectively form a stacked (14) embodiment (14A-14T) of a plurality of cut length (3) embodiments (3A-3T) with force-transferring cross-section (11) embodiments (11A-11T), wherein at least one spear (16) embodiment (16A-16T) is formed by hafting a cut length to a spearhead (2) embodiment (2A-2T) with a force-focusing edge (12) embodiment (12A-12T) that can be urged with a tool (13) embodiment (13A-13T) to move the spear within a confined subterranean bore (6) embodiment (6A-6T) between the bore's and free standing stack member's material and frictional contacts blocking gravitational movement to, in use, limit kinetic buckling (17) using a force-transferring cross section to avoid catastrophic folding (18) to move the cut length hafted to the spearhead laterally and substantially adjacent to the next lower cut length within the bore, wherein the spear's (16A-16T) target can be the next lower cut length (3A-3T) or the haft cut length (3A- 3T) of the next lower spear (16A-16T) in the stack (14A-14T) of cut lengths (3A-3T).

[0071] Planned disposition of features for method (1) and apparatus (2) can be similar to Fig.

I exemplary depositions, whereby Fig. 30 shows an exemplary disposition of the Fig. 1 well components after hafting (7Q) on the left side of Fig. 30, and during urging (13Q) on the right of Fig. 30, for embodiment (1Q) of the method (1). Weil components of Figures 1 and 30 are purely exemplar}', whereby the number, type and disposition of components are unique to every well, and wherein a vast array of well components associated with a proximally circular passageway (8) and proximally cylindrical space (9) of a well can be usable by the present invention.

[0072] Embodiment (Q) of Fig. 30 shows various usable features that can also be applicable to embodiments (A) thru (T) of Fig. 1, whereby embodiments of the present invention can use various conventional or prior art well components beyond those shown in Figures 1 and 30 for bore (6) passageways (8) and spaces (9) of a pipe (5) in pipe (5) well architecture, which is at least partially cemented (37) within various subterranean strata (36, 36.1-36.5). Embodiment (Q) illustrates pipe (5) hanging from a wellhead (29) supported by conductor or surface casing (33) set within the ground (30) or mudline (31) below sea level (32). Valves (34) of the wellhead assembly (29) can access the space (9) about the passageway (8), wherein perforating a separating pipe wall (10) is usable to circulate fluid between the uppermost opening (35) of the passageway, the space and wellhead (29) valve (34) to selectively dispose a fluid within the well's passageway (8) and/or space (9) at the depth of perforation. The well architecture can comprise, e.g., nippies (38), wireline entry guides (39), fluted guides (40), downhole safety, isolation, injection, gas lift, flapper, sliding, revolving bail or check valves (41) and control or chemical injection lines (42) that can be clamped to pipe (5), wherein an anchor or packer (43) and tubing anchor (44) can secure the lower hanging end of the pipe (5) to the bore ( 6). Aspects of wall (10) embodiments ( OA-lQT) with force-transferring cross-section (11) embodiments (11 A-1 IT) usable to limit elastic buckling (17) or bending (17) and, thus, avoid catastrophic folding ( 8) is shown in Fig, 9, while Fig. 13 illustrates how- wall (10) force-transferring cross-sections (11) affect OCTG material yielding (19), elastic buckling (17) and plastic catastrophic folding (18). Embodiments can have cut lengths (3) of coupled pipe that can be whole or selectively axiaily split, as shown by the dashed line of Fig. 9, to provide a selective wall (10) cross section (1 1) that can transfer force to limit buckling to elastic yielding (17) shown in Fig. 13. The method (1) can use friction reducing fluids (68) to lessen the propensity for longer lower frequency cross-bracing (50.1) to plastically yield (19) to form higher frequency cross-bracing (50.2) resulting in catastrophic yield (19, 24) folding (18) shown as the dash-dot line of Fig 9, Applying force with urging tool ( 3) to a force-transferring section (1 1) cut length (3) using the embodiment (2A-2T) spearhead (2) can cause the pipe (5) to buckle with elastic or negligible deformation to focus transferred force to an edge (12) to focus force to cyclically (27, 28) split (15) yield (19, 24, 25) and/or separate material contacts, pipe wall or previously split ends as shown in Fig. 16. The present invention is non-obvious because it is not a single factor but, rather, the combination of wall (10) thickness, cross-section (1 1), cut length (3), force-focusing edge (12) and limited buckling (17) that determine whether, as illustrated in Figures 13 and 16, initial cycling (27) progresses to the present invention's further splitting cycling (28) to avoid catastrophic folding (18). Figures I , 9, 10 and 14 to 16 show elevation cross section and diagrammatic embodiments (A) to (E). Fig. 10 shows an angular cut exposing an adjacent coupling to form an edge (12). Fig. 14, by way of the example, symbolises a hand guiding a spear that is metaphorically comparable to the prior art hammer caishing weakened pipe in Fig. 12, wherein the hand symbolises additional control afforded by a spear (16B) arrangement usable to limit buckling and avoid catastrophic folding. Fig. 15 describes integration of the present method (IC) and apparatus (2C) into a compaction arrangement like Fig. 8, while Fig. 16 compares experiments of prior art compaction to embodiments using an arrangement similar to Figures 15. The Fig. 13 conventional graph of OCTG force per unit of area stress (20) versus the associated strain (21) ratio of deformation to original length in the direction of the applied force shows elastic deformation initially occurring at a ratio (22) of Young's modulus of stress versus strain (22), until the point of plastic yield (19) deformation where the material softens to a proximal 0.2% strain offset proof strength (23) to thereafter strain harden until ultimate yield (24) occurs and the material softens under tension to a point where it separates or parts (25) or continues to harden in compression (26). Plastic yielding (19) of prior art pipe wall portions are a function of the wall thickness and cut lengths, wherein Fig, 16 shows actual compaction experiments of the present inventor illustrating that prior art and the present invention can experience similar "initial" resisting forces and cycles (27) of wall (10) stress and strain when initial leverage is applied by force acting on the end of a cut length (3) that can cause either folding (18) or force focusing edge (12) splitting (15). Figures 13 and 16 also illustrate two forms of splitting (15) comprising focusing force at an edge (12) to cut, shear or tear metal in tension separation (25, 27) and dispositional separation splitting cycling (28) of previously split cut lengths, wherein limited buckling of the spear's cut length within the metal's elastic range (17) transfers sufficient force to overcome frictional and material contacts. Forming bending resistant wall (10) thickness cross-section (1 1) cut lengths (3) differentiate the present invention from prior art catastrophic folding cycles (18), which can initially appear within the same force ranges as splitting (15) cycles (27, 28) of the present invention, as depicted in piston pressure versus compaction graph of Fig. 16.

[0076] Initial compaction cycles (27), when various material contacts within the bore are elastic-ally and/or plastically yielding prior to establishing rigid cross-bracing (50.1- 50.2) or a spearing disposition during the remaining compaction. Initially one method of compaction can be indistinguishable from another to, thus, mask the non-obvious solution (I D, IE) of a complex elastic and plastic yielding problem that cannot be witnessed as it is hidden the bore and, by way of example, is like predicting the outcome of an automobile crash. Force per unit area measured in pounds-per-square- inch (psi) and bar applied by a piston across the bore in Fig. 16 is also the unit of measure for stress (20) in Fig. 13 and the proportions of OCTG are similar for the various combinations of pipe and bore, which means the Fig. 16 graph is generally comparable to most compaction scenarios.

[0077] Weakened proportions of pipe crossing the bore (6) leverage prior art compaction to plastically (19, 24) bend and catastrophicaily fold (18) cut lengths from 1000-psi (69- bar) to 3000-psi (207-bar) as sinusoidal cross bracing frequency increases until compressional (26) bracing causes a final escalating cycle, wherein folding (18) and less remaining space after each catastrophic fold cycle increases required force until compaction of cross-bracing (50.2) must be stopped due to equipment limitations, which were 6000-psi (440-bar) in the Fig. 16 lighter dashed line experiment.

[0078] Embodiment (D) exited the initial cycle (27) into a further splitting (15) cycle (28) using a force transferring spear (16D) haft (3D) with a force focusing edge that yielded material contacts until the cross-bracing (50.3) was overcome and the spear aligned with the next lower cut length to swallow an entire force transferring cross-section (11) cut length (3D), previously split in half, to avoid substantial friction during further separation splitting cycles (28) which, surprisingly averaged half of an proximal upper limit of 1000-psi (69) bar. An even more surprising result was embodiment (E) overcoming cross-bracing (50.3) to exit the initial cycle (27) to further axialiy cut split (15) and swallow a wall (10) over an entire cut length (3) between proximally 1000- psi (69-bar) and 3000-psi (207-bar) ss shown in Fig. 16.

[0079] It is obvious and factual that prior art cutting weakening provides the most compacted volume of material as shown in Figure 11; however, compacting the most material into the least space creates the highest possible friction, whereby a number of prior art compactions can be required to form more substantial unobstructed spaces (64), whereas the present invention's compaction method (1) is less efficient over shorter compaction lengths but can, e.g., provide more substantial spaces unobstructed by pipe (64) using fewer compactions and associated pistons.

Within prior art compaction experiments, yielding of cross sections was sufficiently random to prevent prediction and, thus, shaping a pipe to form a spearhead or inclusion of the additional material of an above ground fabricated spearhead was not afforded a reasonable expectation or likelihood of success. Inclusion of Hatcher's teachings in prior art experiments provided no apparent benefit because weakened sections gravitationaily aligned splayed, buckled and catastrophically folded around any pipe body cut at an angle within the bore to provide the same result, while stronger cross sections could not be compacted when material contacts of a Hatcher angular cut plastically bent to form un-compactable cross-bracing within the bore as shown in Fig. 7. Accordingly, prior art's focus on cutting weakening of pipe and shortening the compaction piston to perform one or more compactions to place the most pipe material in the least space seemed reasonable. Years later, when attempting to measure the parameters of compaction failure, the present invention was discovered when a pipe (5) was angularly severed proximaily to a chamfered edge (12) of a coupling (4) that formed a force focusing edge (12) of a spearhead (16D of Fig. 16) and the process of delineating the surprising result began.

Further experimentation showed that the method (1) and apparatus (2) can be measurable and repeatabie. Once discovered, the non-obvious and distinctly different compaction method (1) of further splitting using cut lengths (3) with substantial wail (10) cross sections (11) can be explained by the elastically resistant (17) limiting of column bending, sinusoidal buckling and/or helical buckling to avoid folding (18) and more effectively transfer compaction force over a longer distance to focus the force at an edge (12) that can be used to separate or cut split (15) cut lengths of pipe. This surprising discovery of using one cut length to split an opposing cut length of the same material "before" plastically yielding either cut length is not an obvious conclusion of the Fig. 13 conventional yielding (19, 24) process which states that a steel's tension separation, shearing and/or tearing (25) occurs "after" folding (18) ultimate (24) and plastic (19) yielding creates prior art cross-bracing (50) of sufficient resistance to stop compaction.

During the final two days of a two week demonstration of the present inventor's prior art, embodiments (D) and (E) were accidental and surprising discoveries that were neither planned nor obvious, whereby both prior art field experience and cited lessons of Mitchell indicate that compaction buckling of whole and, logically, near whole pipe cross sections is unlikely to produce substantial compaction and, thus, the present inventor's prior art concentrated on substantially weakening by cutting cross-sectional wall areas to remove the strength of the pipe. Figures 9, 13 and 16 illustrate how the present invention is differentiated from prior art, whereby full scale experiments, using proximally the same parameters, achieved a substantially adjacent compaction ratio of about 50% in: an embodiment (ID, 2D) urging of a whole wall (10) pipe spear (16) against a next lower cut length axially split into two proximally equal cross- sections (1 1), and an embodiment (IE, 2E) using a whole wall (10) pipe spear (16) urged against a next lower cut length (3) having a single axial wail (10) split into a "C" shaped cross section (11); whereas, a whole wall pipe was urged against a next lower prior art pipe cut length split into four proximally equal prior art cross sections, which resulted in "substantially less than adjacent" compaction of the whole and split cut lengths.

The surprising discover} ⁷ of the present invention's additional methodical (1 ) compaction splitting (15) mode using a force focusing edge (12) on a spear (16) head

(2) urged by a tool (13) transferring force through a cross-section (11) that can incur limited buckling (17) but avoid folding (18) along its cut length (3) to focus the transferred force at the spearhead's (2) edge to further split (15) the target cut length

(3) and move cut lengths laterally and substantially adjacent to each other is not obvious because the initial folding (18) can be indistinguishable from the cycling cutting (27) and separation (28) splitting (15) of Fig, 16. Once the present splitting (27, 28) is realised and found repeatabie, considerable research is needed since it cannot be seen as it occurs with only the data of Fig. 16 available. Accordingly, the method (1) is not obvious, but once the problem is formulated and solved in the light of the discover}'-, it can become easier to see how using stronger cross-sections (11) with a spearhead (2) can work and be applied to simplify and alleviate various complex problems and compaction challenges. V arious described illustrative embodiments ( I A- 16T) of method ( 1 ) and apparatus (2) can use and/or adapt conventional or prior art tool members, wherein interoperability can exist between, e.g., strings of coupled (4) pipe (5), downhole tools (7, 13) and features of subterranean well and bore (6) elements, which can extend to the above ground surface systems comprising, e.g., rigs, workover units, masts, winches, wellheads, pumps, valve trees, control and signal processing systems. For example, a conventional or prior art string of wire, coiled tubing or coupled pipe can deploy an amalgamation of assembled tools or fluids associated with, combinable with, or adapted to be usable with or form at least a hafting (7) or urging (13) tool embodiment (7A-7T, 13A-13T), wherein the associated, combined or formed hafting (7) or urging (13) tools can be selectively arranged to provide selective actuation, signal conductance and transmission or conversion of mechanical, electrical, explosive and/or hydraulic energy into an associated force or, alternatively, to absorb a force and convert it into energy, which in amalgamation, are usable to provide the necessary requirements of the method (1) of forming and using a spearhead (2) apparatus of the present invention. For example, various tools and aspects of the art of downhole fishing or pipe retrieval are usable or adaptable to the present invention, albeit for a contrary purpose of urging pipe into a substantially greater stuck-in-hole disposition, wherein various fishing aspects of, e.g. : guides (2G), cut-lip-guides (2F,2I-2P), wail-hook-guides (2F), over- shots (2F, 2I-2L), spears (2A-2T), releasing spears (2G), bumper subs (13P), jars (13P), intensifiers (13P), shoes (2G), wash pipes (2F, 2I-2L), scrapers (13C, 13Q), patches (13C, 13Q) and cutters (2F, 2H, 2J, 2S-2T) can be adapted and used within the spirit of the present invention. Actuation of any suitable conventional or prior art tool, or associated tool function can be combinable or adaptable in an amalgamation of at least one urging tool (13) or hafting tool (7), wherein any manner of interoperability between pipe, spears, tools and/or connections and linkages is usable with cut lengths, spearheads, targets and/or above ground surface systems or internal tool systems selectively arrangeable into an amalgamation of at least a hafting and urging tool selectively disposable and actuatable within a well to provide the claimed method (1) and apparatus (2), A stack (14) comprising a selectively formed and stacked plurality of cut lengths (3), wherein selectively splitting (15) pipe (5) using selective hafting tool(s) (7) can be usable within a method (1) that can use interoperability of conventional and/or prior art systems of tools amalgamated to provide a necessary function of hafting or urging. For example, a casing collar locator (CCL) member with transducers converting variations in a pipe's (5) wall (10) into electric signals identifying couplings, can be amalgamated with another member to selectively dispose a hafting tool (7) member comprising, e.g., a splitting tool that selectively cuts or severs a pipe (5) wail (10). Members in the system of hafting tool(s) can be actuated using, e.g., other members comprising downhole timers, pressures, temperatures and/or kinetic motion to initiate a suitable energy source associated with accelerating a mass to provide force to hafting or urging operations. Any amalgamation of members forming at least one hafting tool

(7) can depend upon various subterranean well and bore circumstances, wherein, e.g., members can comprise a single wireline or coiled tubing tool string performing a plurality of splitting and hafting operations in a single downhole trip or, alternatively, it can be a plurality of members used over a plurality of trips using, e.g., a rig designed for drilling, coiled tubing and/or wireline. Referring to Figures 2 to 8 and 1 1 to 12 depicting theoretically possible but unlikely compaction scenarios and prior art. The ordinary meaning of pipe (5) within the art includes both the body (45) and coupling (4) of the pipe, wherein the pipe body (45) can have an external upset (46) or be integral (47) with the coupling. Pipe bodies (45) with and without an external upset (46) can have couplings (48) where the pipe body ends are separated such that the inset diameter of the coupling forms part of the passageway to, thus, form a proximally circular passageway (8) or, alternatively, couplings (49) and bodies of the cut ends can meet at a proximally flush condition with the internal passageway (8). If the cut ends, instead of the threads, are used to form a pressure seal with the coupling it can be referred to as a premium connection. Accordingly, couplings cause form part of a pipe's internal proximally circular passageway or proximally cylindrical space within a pipe-in-pipe well architecture. Hatcher' s lessons (Fig. 2) teach that a tool can be passed thru the pipe (5) passageway

(8) to angularly split (15) the body to fit within the space (9) of a pipe forming the bore (6), When studying Hatcher's lessons it is important to understand that practice within the art is conscious of pipe clearances and minimises cost by drilling the smallest diameter hole necessary to fit the largest possible diameter pipe-in-pipe well architecture, wherein neither the pipe body (45) or coupling (47-49) are likely to fit side-by-side within the bore (6) of most wells as shown in Fig. 5 and Fig. 6, whereby Hatcher may be referring to a Fig. 4 arrangement. For example, Fig. 4 shows a relatively rare instance where the reservoir is shallow and drilling easy within soft formations of an offshore environment to allow use of a 3.5 in. (88.9mm) OD pipe within a 9.625 in. (244.5mm) OD pipe; however the pipe bodies are still unlikely to pass each other because they both will fall to a similar side and couplings (4) will not pass within the space (9). Typically, for the typical proportions of OCTG pipe-in-pipe arrangements, as shown in Figures 5 and 6, neither the pipe body (45) or couplings (4) will physical pass each other in the space. The theoretical compaction configurations of Figures 4 to 8 are impractical, because pipe diameters will rest to the same side to at least oppose each other due to friction across the cut planes. No well's bore is perfectly vertical so cut pipe will fall to a lower side or bridge across the well bore even in a near vertical well to form cross- bracing (50) pipe engaged with opposite sides of the bore. In theory, severed strong whole and axially split halves of a pipe's body (45) should fit into adjacent positions within a well's bore; however, in practice, wells are never truly vertical and often inclined such that angularly severed whole and axial split cross sections always fall to rest at a common side or fall across the well bore in opposing factional positions. As shown in Fig. 7, when stacked opposing perpendicular or angularly cut sections are urged into a confined subterranean cylindrical space they move into cross-bracing (50) positions that result in initial compaction cycling (27 of Fig. 13 and 16). Whether an angular cut has rough edges or is smooth, in practice, an edge of one of the cut lengths scoops up the other to form cross-bracing (50) dispositions between opposite sides of the bore's diameter shown in Fig. 7. Forcing one against the other will result in plastic yielding that eventually progresses to catastrophic folding unless spears and cut length features of the present invention are used. Cross-bracing (50) occurs when whole and/or split sections are urged into a confined cylindrical space and the probability of the theoretical results in Figures 4-6 is unreasonably low until lessons of the present invention are applied. Cross sections that gravitate to a common side of the bore act in a similar cross-bracing manner for both prior art and the present invention, whereby exiting the initial cross-braced dispositional cycling (27) requires a force focusing edge (12) more yield resistant than the edge of the wail it opposes. Urging opposing cut lengths of equal yield resistance causes similar buckling that, in practice, typically causes sufficient friction to result in catastrophic folding (18). Accordingly, use of angular severance without limiting buckling and transferring force thru cross sections to a force focusing edge typically results in similar degradation of cross sections and, therefore, prior art has focused primarily upon substantially weakening pipe to remove a cut length's column cross-braced (50) resistance to compact the most material into the least space. Also, prior using pivotal members to pilot deformed but contiguous passageways cannot similarly pilot a passage blocked by cross-bracing (50) because the passage is not contiguous and flexible piloting members simply follow and re-enforce cross-bracing to cause even less compaction.

Figures 8 and 1 prior-state-of-the-art compaction depict a piston (51) with standing and travelling valves (52) within an inflatable sealing element (53) arrangement deployable thru a pipe (5) passageway (8) into a confined space (9) to engage single or stacked cut lengths (5.1, 5.2), which inevitably cross-brace (50) and fold (18) catastrophically to limit compaction. Leaks in the bore (6) can occur below the piston into an overburden fracture and reservoir (54) according to the density and pore pressure of the overburden to release fluid trapped beneath the piston (51) as it is pumped (58) downward, wherein standing and travelling valves within prior art are to release pressure trapped within the cylindrical space to prevent hydraulic locking of a non-elastic compaction process. Overburden reservoir leakages (55) can also occur above the piston (51), which can limit applicable force if untreated by viscous sealing fluids (56) that can also be applied to prevent leakages between the piston (51) and bore (6). The piston (51) is urged by a fluid (57), which can be water or a denser fluid providing mass, accelerated to provide force using a pumped (58) injection into the passageways without returns from the annular space between the pipe (5) and bore (6) to, thus, apply force to the upper end cut length (5.2), wherein folding ( 18) typically occurs close to the point of force application of the piston (51) when cut length (5.2) in Fig. 8 is weakened or a lower weakened cut length (5.1) in Fig. 11 if the upper cut length transfers force, wherein minimal yielding of stronger cut length (5.1 in Fig. 8, 5.2 in Fig. 11) cross-bracing (50.1) with yielded cut length (5.2 in Fig. 8, 5.1 in Fig. 1 1) cross-bracing (50.2) in compression (26 of Fig. 13) acting like brace supports of bridges and buildings. Accordingly, as shown in Fig. 12, by way of example, prior-state-of-the-art compaction seeks the maximum force of a piston (51) to cyclically hammer cut pipe (5.2) against substantially split and weakened cut sections (5.1) of substantially lower buckling strength to maximise compaction and, where the random nature of folding is favourable, at least partially drive a strong pipe into folded cut lengths like driving a nail into a material like concrete or strata where penetration is limited. Figures 10 and 14 to 16 explain an improved method (1 A-1E) of forming a spearhead (2A-2E) on a cut length (3 A2-3E2) spear (16A-16E) of coupled pipe (5A-5E) that can be urged laterally and substantially adjacent to a next lower cut length (3A1-3C1) to occupy substantially the same axial length within a bore (6A-6E). Similar outcomes to embodiment (D-E) can use spear (16A-16C) embodiments (A-C) with passageway (8) deployed hafting tools (7A-7C) to split pipe (5A-5C) using, e.g. : using cutting wheels, chemical cutters, lasers, or other suitable hafting means or urging tools driving force focusing edges of the present invention. Axially and/or angularly splitting (15A1-15C4) one cut length (3A1-3C 1) from another (3A2-3C2), across whole or previously split (15A1 -15C2) pipe walls (lOA-lOC), using an exposed edge (12A-12C) of a coupling (4A-4C) can use, e.g., knife or wheel cutters to transversely and/or longitudinally split (15A3-15C3) the pipe wall to form a plurality of cut lengths (3A1-3C2) with force transferring cross-sections (11 A-l 1C) and force- focusing edges of exposed couplings and/or added edges. Further splitting (15 A2, 15B3, 15C4) can separate and/or swallow (IB-ID), or shear, separate and/or swallowing (1A, IE) an axial split end of the next lower cut length (3A1 -3C1). Thinner pipe bodies with less resistant to further splitting than associated couplings can be cut to expose a coupling with, e.g., a chamfered edge to form a spearhead (2D- 2E) usable to further split cut lengths during urging. Where pipe body material marginally obscures coupling exposure, urging can shear cut opposing wails in equal amounts across opposing cut lengths until the coupling's force focusing edge is exposed and splitting stops at the coupling but continues in the pipe body material.

c An urging tool (13A-13C) deployable thru a pipe passageway (8A-8C) into a confined bore (6A-6C) space (9A-9C) of coupled pipe cemented (37) into the strata can engage and urge stacked (14A-14C) cut lengths using a controllable pumping (59) system. Inflation (53) of an urging tool can occur within the pipe (5) and expand to the bore (6) space (9) to form a piston (51) usable to urge a spear (16A-16C) cut length (3A2- 3C2) adjacent to a targeted next lower cut length (3 A 1-3 CI ). Embodiments can use a Fig. 15 method (1C) with standing and travelling valve (52) within an inflatable sealing element (53) piston, whereby the piston can also be usable as a scraper to clean the bore's wall with slats (67 of Fig. 30) placed on it element

(53) . Pressure relief travelling valving (52) can prevent hydraulic locking but they can also provide cycling (13C1-13C2 and 27-28 of Fig. 16) that can vibrate elastic (17 of Fig. 13) kinetic buckling force transferring cross sections (11) to overcoming frictional forces when further splitting a target cut length to provide more substantial lateral and adjacent movement of a spear. Cycling (13C1-13C2) occurs due material yielding or frictional release as well as fluid injection friction thru leaks in the bore (6) below the piston into a permeable rock and/or an overburden fracture reservoir

(54) , wherein the injection of fluid into rock is conventionally associated with connected pore spaces and/or the mass and pore pressure of the overburden necessary to open or re-open a fracture to release fluid trapped under the (51) as it is urged downward within the cylindrical space of the bore (6). Similar permeable and density regulated overburden reservoir bore (6) leakages (55) can occur above the piston (51), which could limit applicable force if untreated by patching the bore using, e.g., chemical compounds that expand across a pressure drop or viscous sealing fluids (56) within an assembly of fluid types and/or densities in the passageway, bore and/or annular space between bore and pipe that is often referred to as a fluid train pumpable between the passageway and the valves of the wellhead. A fluid assembly or fluid train is also usable to place viscous fluid to prevent leakages between the piston (51) and bore (6) of fluid (57) used to urge the piston (51), which provide an accelerated mass resulting in force from pumping (58) fluid into the passageway (8), while the wellhead valves (34) are closed to, thus, apply force to an urging tool (13A-13C) driving a spear. Referring to Figures 17 to 19 illustrating method (1) tight tolerance embodiment (IF) adaptation of an above ground fabricated split-ring spearhead (2) embodiment (2F) with wali-hook-guide and over-shot cut-iip-guide and wash pipe with cutting edge member features amalgamated to form a cut length (3F2) spearhead (2F) and force- focusing edge (12F) usable provide a further split ( 15) embodiment (15F, 15F3) in the next lower cut length (3F1). Fig. 17 shows that the well is inclined with cut lengths resting at the bore's (6F) lower side, while views of Figures 18 and 19 are rotated 90 degrees to show expansion of the split-in-the-ring (69). Various spearhead (2F) member features and member linkage features can comprise, e.g., metals, ceramics or plastics deployed thru the passageway (8F) and self-actuated via timers comprising, e.g., fuses, clocks or chemical reactions that can be usable to engage the spearhead to a cut length. A hafting tool (7F1) can split pipe (15F1-15F2) form a haft and a hafting tool (7F2) can use space (9F) provided by release of tension shortening of a hanging cut length (3F2) and/or slumping of a free-standing cut length (3F) to haft a spearhead onto the lower facing end of a cut length (3F2) to form a spear (16F) by exiting the lower end of the cut length formed by a previous hafting tool (7F1 ), whereby hafting tool (7F2) can be lifted to engage a spring activated downhole disposable tubing end locator (59) that places the spearhead (2F) proximally against the lower facing end, after which a conical expander (60) can expand the split-ring spearhead force-focusing edge to allow the disposal of the locator downhole and downward movement an open- ended cylindrical ring with external circumferential serrations (61) urged into the split-ring portion of the spearhead acting as anti-slip segments with internal and external serrations (62) that secures the spearhead to the cut end of the pipe (5F) wail (lOF) and maintains an open diameter thru which the conical expander (60) can be removed and within which at least part of a next lower cut length (3F1) can be split (15F3) and swallowed. Once split (15F3), an urging tool (13F) can move the stack (14F) which can rotate the spear (16F) under the compressive forces of urging, spear weight and, e.g., an adapted jar member feature, used with or instead of standing and travelling valves to aid spear momentum and harness pressure cycles of Fig. 16. A helical orienting spearhead (2F) can also be engaged by an urging tool (13F) capable of providing substantial momentum using, e.g., explosives or jarring to spud the spear (16F) at speed to utilise lower dynamic friction of momentum, wherein the force- transferring cross-section (1 IF) and helical rotation profile can rotate and guide the spearhead (2F) and spear (16F) haft (3F2) substantially adjacent to the next lower cut

"7 length (3F1) with limited buckling while avoiding catastrophic folding. Other urging tools with a lower potential for momentum can also use the rotary torque feature of the spearhead (2F) using fluid pressure, hydrostatic pressure, differential pressure and/or fluid density forces associated with gravitational pull. Interoperability of various connecting linkages of the spearhead (2F) and hafting or urging features or tools of the method (IF) can comprise, e.g., an amalgamation of connectors of a rotary (2F), snap (61 , 62), slip (61, 62), segmented (61 , 62), threaded and/or shear pin (59) connectors. The method (IF) can also use hafting or urging tools operated by drilling rig jointed pipe strings, rig-less jointed pipe strings, coiled strings comprising, e.g., coiled tubing, electric line or siickline. Referring to Figures 20-21 of method (1) embodiments (lG-lH) spearhead (2) embodiments (2G-2H) with conical guide shoes shown at the inclination of the well bore (6G-6H), wherein gravity aligns cut lengths (3G1-2H2) to the lower side where the bore and material contacts between cut ends prevent gravitational movement. A hafting tool (7G) can split (15G1) wall (10G) in the pipe (5G) to form force transferring cross-sections (3G1, 3G2), then split (15G2) the wail and passageway (8G) to haft an above ground fabricated spearhead (2G) with a plurality of tubing end locators (59) and engaging linkage mechanisms, e.g. slip arrangements (63) similar to those of a production packer to the hanging end of the pipe (5G) before hafting another split (15G3) to form a force transferring cross section (11G3) at the upper end of plurality of cut lengths (3G1-3G3) stack (14G). An urging tool (13G) can move the spearhead's low factional deflectional force focusing edge (12G) to further split the next lower cut lengths (3G1-3G2) by separating (3G1) cross section ( 11 G 1 ) from (3G2) cross section (11G2) to place the cut lengths (3G) substantially adjacent to each other within the confined bore space (9G). Spearhead (21 1 } can use a similar linkage and conical guide shoe with internal knife like force-focusing edges (12H) expandable to a diameter greater than the internal diameter of the passageway (8H), wherein hafting tool (7H) can split (15H1 -15H2) a pipe's (5H) wail (10H) forms a stack (14H), wherein the spear (16H) with above ground fabricated spearhead (2H) can be usable to further split (15H3) target cut length (3H1 ) cross section (1 1 HI) using urging tool (13H) against cross section (11H2). Referring to Figures 22-28 and 31-32 of embodiments (I) thru (O) and (R). Figures 22-24 show method (1) embodiments (II- IK) with spearhead (2) apparatus embodiments (2I-2K) indicating alignment of material contacts within the well bore (6I-6K) blocking gravitational movement prior to compaction. Figures 25-26 illustrate the laterally adjacent disposition of spear (16) embodiments (16L-16M) of over-shot or swallowing of a target cut length (3L1, 3M1) when compacting laterally substantially adjacent cut lengths (3L-3M) with upper and lower couplings (4L-4M) approaching each other. Figures 27-28 depict a spear (16N-160) providing disposing separational splitting (15N4, 1504) of a previously split (15N1 , 1501) wall (10N- 10O) when compacting laterally substantially adjacent cut lengths (3N-30) with upper and lower couplings (4N-40) approaching each other. Figure 31-32 illustrate compaction between a plurality of couplings (4R1-4R2) using a combination of overshot swallowing splitting (15R6) of cut lengths (3R2) by (3R3) and (3R2, 3R3) by (3R1) disposing separational splitting (15R7) of a plurality of spears (16R1-16R2) within a stack (14R) of cut lengths. Various prior art and/or physical feature similarities of fishing and pipe recover} ⁷ : cut-lip-guides (21-20), over-shots (21-21.), wash pipes (2I-2L), cutting edge (12H, 12 J), knives (12J), abrasives cutting (7 J), chemicals cutting (7 A, 71, 7L-70/7R), explosive joint split shots (7K), pyrotechnics (7L-7M), laser cutting (7N-70), chemical cutting burst discs (71), wash pipes (2G), knives ( 12 J, 12H), radial torch cutting (7G), are usable, albeit for the contrary purpose of spear (16) compaction.

[0103] Method (1) embodiment (II) of Fig. 22 can, e.g., can use tools (71, 131) thru a passageway (81) of an external upset pipe (51) to split (1512) and expose a coupling (41) using angular severance across a previous split ( 1511) between force transferring wall (101) cross sections (1 111 -1112) using, e.g., a chemical cutter (71) to form a stack (141) of cut lengths (311-313) with at least a force-focusing edge (121) usable and split (1513) a haft (313) to dispose separation of previously split cut lengths (311-312) with an urging tool ( 131) moving cross section (1 113) cut length (313) haft, with spearhead (21) apparatus (2) coupling (41) force focusing edge (121) forming a spear (161) on a pipe (51) end, usable to laterally and substantially dispose the lower cut lengths (311 - 312) within a confined space (91) of a subterranean bore (61).

[0104] Method (1) embodiment (1 J) of Fig. 23 can use tools (7J, 13 J) thru a passageway (8J) with a close tolerance between the bore (6J) and an integral external flush or external upset coupling (4J) of a pipe (5J) helically or spirally split (15J2) severed at a changing angle by a hafting (71) tool across a previous split (15J1) between force transferring wall (10J) cross sections (1 IJl-l 1 J2) using, e.g., an abrasive or radial torch cutter to form a stack (14 J) of cut lengths (3J1-3J3) with an engaged above ground fabricated force-focusing edge (12J) of a spearhead (21) hafted to cut length (3J3) usable for disposing separation splitting (15J3) of previously split cut lengths (3J 1-3J2) and/or swallowing splitting of part of one of the next lower cut lengths (3J1-3J2), wherein splitting (15J3) and using an urging tool ( 13 J) to move the spear (16J) haft (3J3) and spearhead (21) apparatus' s (2) edge (12J) splits (15J4) and/or cuts the target (3J1 or 312) to laterally and substantially dispose the haft (3 J3) adjacent to a lower cut lengths (3J1-3J2) within a confined space (91). Method (1) embodiment (IK) of Fig. 24 can be usable with a premium substantially internally flush coupling (4K) thru a passageway (8K) with a pipe (5K) split (15K1) at the lower coupling thread area using a hafting (7K) tool capable of, e.g., axially cutting with wheels, chemicals, explosives or other means, to split (15K1) across and separate the threads from the pipe body and coupling to allow applied and/or gravitational mass tension splitting (15K2) disposing of the body from the coupling create opposing facing ends. Another hafting tool (7K) split (15K3) using any severance means can provide a stacked (14K) plurality of cut lengths (3K1-3K3) with force transferring wall (10K) cross sections (1 1K1-1 1K3) usable to transfer force between an urging tool (13K) and the a force-focusing chamfered edge (12K) of the spearhead (2K) coupling apparatus (2) of a spear (16K) for further disposing separational splitting (15K4) of the previously split (15K1) cut lengths (3K1-3K2) to laterally and axially dispose the haft (3K3) substantially adjacent to next lower cut lengths (3K1-3K2) within a confined space (9K) of a subterranean bore (6K). Method (1) embodiment (1L) of plan view Fig. 25 pipe-in-pipe well arrangement and embodiment (1M) of elevation cross section Fig. 26 of pipe cemented (37) into the strata (36) arrangement, illustrate a premium substantially internally flush coupling (4L-4M) with a passageway (8L-8M) of a pipe (5L-5M) axially split (15L1-15M1) using axial cutting and angular severance splitting (15L2-15M2) hafting tools (7L- 7M) proximally at the coupling to form a force-focusing edge (12L-12M) of the spearhead (2L-2M) apparatus (2). Hafting tool severance splitting (15L3-15M3) can use any means to stack (14L-14M) a plurality of cut lengths (3L1-3M2) with force transferring wall (10L-10M) cross sections (11L1-11M2) usable to transfer force between an urging tool (13L-13M) and the a force-focusing edge of the spear (16L- 16M) to over-shot or swallow further split (15L4-15M4) the previously split (15L1- 15M1) cut lengths (3L1-3M1) to laterally and axiaily dispose the haft (3L2-3M2) substantially adjacent to a lower cut lengths (3 LI -3 Ml) within a confined space (9L- 9M) of a subterranean bore (6L-6M). An urging tool (13L) depioyable thru the pipe passageway (8L) can be expanded from the pipe (5L) internal diameter to the bore (6L) internal diameter so that fluid pressure can be applied above a piston to move cut lengths below the piston. Additionally, the method set (1) can be usable on the outer pipe (5L2) once the inner pipe (5L1) has been compacted and, thus, removed to provide access to pipe (5L2) for compaction within the outer bore (6L2) from the passageway (8L-8M).

[0107] Method (1) embodiment (IN) of Fig. 27 plan view and embodiment (10) of Fig. 28 elevation cross section show disposing separational splitting (15N4-1504) using the force focusing edge (12N-120) of a premium substantially internally flush couplings (4N1-402) and wall (10N-10O) split (15N1-1503) with hafting tools (7N-70) depioyable thru a passageway (8N-80) of the pipe (5N-50) axiaily splitting (15N1- 15N1) and angularly sever splitting (15N2-1502) proximal to the coupling end to form the spearhead (2N-20) apparatus (2). A further hafting tool (7N-70) can sever split (15N3-1503) a cut length haft (3N2-302) to form a stack (14N-140) with a plurality of cut lengths (3N1-302) with force transferring cross sections (l lN-1 10) usable to transfer force between an urging tool (13N-130) and the a force-focusing edge (12N-120) of the spear (16N-160) to further split (15N4-1504) the previously split (15N1-1501) cut lengths (3N1-301) to laterally and axiaily dispose the haft (3N2-302) substantially adjacent to a lower cut lengths (3N1-301) within a confined space (9N-90) of a subterranean bore (6N-60).

[0108] Figures 31 plan view and Fig. 32 elevation cross sectional view of method (1) embodiment (1R) illustrating compaction of a plurality of spears (16R1-16R2) with premium couplings (4R1-4R2), or any other coupling, wherein a hafting tool (7R) capable of, e.g., axiaily cutting with wheels, chemicals, explosives or other means is deployed thru a passageway (8R). Axiaily splitting (15R1) lower pipe (5R1) body below coupling (4R1 ) to form cross-sections (1 lRl-1 1R2), axiaily splitting (15R2) a middle pipe (5R2) body between couplings (4R1-4R2) to form cross-sections (11R3- 1 1R4), angularly splitting (15R3) lower pipe (5R 1) body across axial split (15R1) just below the lower coupling (4R1) fabricates a lower subterranean spearhead (2R) apparatus (2) embodiment (2R1) with a coupling (4R1) force focusing edge (12R1) above an axiaily split cut length (3R1), Angularly splitting (15R4) middle pipe (5R2) body across the axial split (15R2) cut length (3R2) forms a haft of a lower spear (16R1). Splitting ( 15R4) just below the upper coupling (4R2) fabricates an upper subterranean spearhead (2R) apparatus (2) embodiment (2R2) with a coupling (4R2) force focusing edge (12R2) above an axiaily split cut length (3R2), while transversely splitting (15R5) forms a whole cross section (11R5) cut length (3R3) haft of spear (16R2), wherein substantial gravitational movement is blocked by the limited buckling of the force transferring wail (10R) cross sections (11R1-11R5) of the cut lengths (3R1-3R3) and material contacts between the stacked (14R) plurality of cut lengths (3R1-3R3), spearheads (2R1-2R2) and the bore (6R) within the step previous to the disposition shown in Figures 31 and 32. Figures 31 and 32 show the dispositions after an urging tool (13R) was used through the pipe (5R) passageway (8R) to engage the upper end cut length (3R3) and urge axiaily downward movement of the upper spear's (16R2) force-focusing edge (12R2) of the spearhead (2R2) apparatus (2) to further split (15R6) previously split (15R2) cross sections cut length (3R2) by swallowing cross section (11R4) to split it from its mate (11R3) to, thus, urge the cross-sections (11R3-11R4) laterally apart. In a coincidental, or alternating cyclical, pattern dictated by incidental friction applied to either spear, the lower spear (16R1) is urged by its material contact with the upper spear's (16R2) force transferring cross-sections (11R3-11R4) to urge lateral separation of cross sections (1 lRl-1 1R2) laterally apart using its force focusing edge (12R1 ) spearhead (2R1 ), wherein the force-tra sferring cross-sections of the lower cut length (3R1) limit buckling to avoid catastrophic folding to, thus, limit kinetic buckling and transfer force from urging of the upper spear (16R2) to further split the haft of the lower spear (16R1) to further split (15R7) and dispose the lower cut length (3R1) in a stacked plurality of cut lengths (3R1-3R3) laterally and substantially adjacent to a lower cut lengths (3R2-3R3) within a confined space (9R) of a subterranean bore (6R). [0110] Isometric view method (1) embodiment (I S) of Fig. 33 and embodiment (I T) of Fig. 34 can use spearhead (2) embodiments (2S-2T) with features (3S-16T) similar to those taught herein and cutting or knife edges (12S-12T) are usable to focus force to further split by lateral separation and/or cutting and lateral separation using force transferring cross sections, wherein a spike shark-like-fin or cutting-barb spearhead (2S-2T) apparatus (2) with force-focusing edge(s) (12S-12T) can be hafted to a cut length by driving the spearhead (2S) into the wall of the pipe or hafted by slipping (61,62) the spearhead (2T) over the end of the wall of a transversely severed cut length of any type of internal or external upset and internal or external flush diameter pipe coupled by, e.g., any threaded, snap, flanged, interference shrink-fit or welded coupling. The surface fabricated apparatus (2) embodiments (2S-2T) limit additional material added to the inner diameter of a passageway to maintain an over-shot or swallowing capability described in various other embodiments. The height and number of spearheads (2S-2T) on a single cut-length to form a spear can vary by pipe diameter, bore diameter, coupling diameter and wail thickness to provide further low factional splitting. Once hafted, the spear can be urged into a confined space of a subterranean bore as described in various other embodiments.

[0111] Above ground fabricated spearhead apparatuses (2) embodiments (2F-2H, 2J and 2S- 2T) can be adapted to various shapes, sizes and force-focusing edges that can be hafted to a cut length of pipe and urged to further split next lower cut lengths. The shape, size and force-focusing edge (12) of a spearhead (2) can be adapted to selectively split cross-sections to continue force transfer during compaction. For example, spearheads fabricated above or below ground in a subterranean environment can use existing downhole material associated with the pipe, especially couplings, and/or provide additional material to further axialiy split, e.g., a severed whole and unweakened pipe body to overcome the problem of sinusoidal and helical buckling and cross-bracing resisting compaction to, thus, remove the prior art need to substantially weaken and catastrophic fold cross-sections during compaction.

[0112] Method (1) and apparatus (2) embodiments (1P-1Q) of Fig. 29 diagrammatic elevation quarter cross-section and Fig, 30 diagrammatic elevation cross-section of a well and quarter section of pipe illustrate the various possible method and apparatus outcomes following the exemplary Fig. 1 starting point. Embodiments (12P1-12P7) force- focusing edges (12) of spearhead (2) embodiments (2P,2Q!-2Q4) can have an effective diameter larger (12P1) or less than (12P2) the passageway (8P,8Q1-8Q2) and extend from the split (15P2) pipe (5P) body or severed (15P1) end of a cut length (3P2-3P5,3Q2-3Q5) or have an edge (12P3) supported by a coupling (4P) or be split (15P3) and angle to an edge (12P4) of a coupling (4P) or use a coupling's (4P) edge (12P5) or an edge (12P6) driven through a coupling (4P) or a split coupling's edge (12P7), wherein any suitable in-situ, formed or added edges (12) of any threaded, snap, flanged, shrink-fit or welded coupling (4P-4Q) can provide an edge (12) usable to focus force. A hafting tool (7P-7Q) can pass through the passageway (8P-8Q) and form a wall (10P-10Q) force-transferring cross-section (1 1P-1 1Q) by sever splitting (15P1) traverse or at an angle (15P3), perforate splitting (15P2), axially splitting (15P3), helically or spirally splitting (15P4) over a length suitable to transfer force, split-shot coupling splitting (15P5) and, selectively, repeat or create a pattern of various types of splitting (15P6) to form and/or further split free-standing stacked (14P-14Q) cut length (3) embodiments (3P1-3Q5), Above ground materials can also be hafted to cut length and/or supplement a subterranean fabricated spearhead using any conventional or prior art linkages: wherein, provided the linkages maintain a force-transferring cross-section, said linkages can , e.g. include: springs connectors, joint connectors comprising, e.g., ball joints, knuckle joints, hinge joints and/or flexible material joints, dog or mandrel and their associated receptacle connectors, coupled connectors comprising, e.g., glues, welding and/or spikes, membrane expandable or swellabie connectors, and/or serrated, slip, and/or segmented connectors to engage cut lengths (3P1-3Q5) to provide interoperable features like, e.g., hook-wall guide orientation, improved splitting of target cut lengths or other force focusing feature. Cross sections (1 1 P-1 IQ) can transfer force between members of the stack to urge the uppermost split (15P7, 15Q9) cut length to further split cut lengths using urging tools (13P-13Q) with, e.g., member: bumper subs, jars, jarring intensifiers, scrapers (67), detachable or associated fluid bore or element leak-patches, which can aid downhole pipe compaction and/or load force-focusing edges (12P-12Q) with associated, e.g., knives, cutting fins, cut-lip-guides, over-shots, grapples, slips, conical surfaces, flipping or expanding mechanisms, tubing-end-locators or other members or linkages usable to form a spearhead (2P-2Q) apparatus (2) on a cut length (3P-3Q) forming a spear (16P-16Q) to further split cut lengths or further split previously split cut lengths (3P1-3Q4) to laterally and axiaily dispose a spear haft cut length substantially adjacent to a next lower cut length within a confined space (9P-9Q) of a subterranean bore (6P- 6Q).

[0116] The left side of Fig. 30 shows a hafting tool (7) embodiment (7Q), which can comprise any prior art tool or amalgamation of tool members, deployable through the uppermost opening (35) of the passageway (8) embodiment (8Q) to split (15Q1 ) then sever split (15Q2) the pipe (5Q) above, e.g., a slide door valve (41), whereby pipe above hangs from the wellhead (29) and the lower cut length (3Q1) slumps in the bore (6Q) of a subterranean space (9Q) confined by a production packer (43). As taught by the lessons of Mitchell, the cut length (3Q1) will sinusoidal iy and/or helically buckle and materially contact the bore (6Q) causing significant friction that prevents substantial downward gravitational movement of the upward facing end of the cut length (3Q1). The same or different tool (7Q) then hafts a spearhead (2Q1) to the lower facing end of the hanging pipe (5Q). A hafting tool (7Q) can axiaily split (15Q1, 15Q3, 15Q5, 15Q7) the hanging wall (10Q) to form a force-transferring cross-section (HQ) cut lengths (3Q2-3Q5) using severance splitting (15Q2, 15Q4, 15Q6, 15Q8) to fabricate a spearhead (2Q1-2Q4) or haft an above ground fabricated spearhead to a cut length to form a new or supplement a previously formed spearhead with additional force focusing edges (12Q) on a hanging lower cut end before severance splitting (15Q4, 15Q6, 15Q8-15Q9) stacking (14Q) occurs.

[0117] Wells are generally formed with coupled (4Q) pipe (5Q1-5Q3) in pipe (5Q2-5Q4) arrangements, where in the inner pipe's diameters are less than the outer pipe diameters with one cemented within the other at various locations. Accordingly, the present invention can be useable where cement (37) does not engage an inner (5Q 1- 5Q3) to an outer (5Q2-5Q4) pipe, respectively, and, e.g., as shown on the right side of Fig. 30 the outer pipe is accessible after compaction, wherein hafting and urging tools are deployed through an inner pipe (5Q1 ) passageway (8Q1) into the space (9Q1 ) of the former outer pipe (5Q2), which becomes the inner pipe after compaction urging (13Q2) and, thus, space (9Q1) becomes the passageway (8Q2) with the next outer pipe's (5Q3) uncemented proximally cylindrical space (9Q2) usable for further compaction of the pipe (5Q2).

[0118] The method 1 embodiment (1Q) compacts pipe (5Q1) by deploying urging tool (13Q 1) through the uppermost opening (35) and passageway (8Q1) to the uppermost lower facing split (15Q9) cut end where it is inflated or expanded to form an urging tool embodiment (13Q2) that forms a piston against the bore (6Q) embodiment (6Q1) and fluid pressure is applied in the passageway (8Q1) and space (9Q1) to urge spears (16Q1-16Q4) to further split opposing cut lengths (3Q1-3Q4) or further split previously split (15Q1, 15Q3, 15Q5, 15Q7) cut lengths (3Q1 -3Q4) to laterally and axiaily dispose the stacked (14Q) spear (16Q1-16Q4) haft cut length (3Q2-3Q5) substantially adjacent to next lower cut length (3Q1-3Q4) within a confined space (9Q1) of a subterranean bore (6Q1), wherein the process can be repeated at a shallower depth of the uncemented pipe (5Q1) within pipe (5Q2) or proximally the same depths within the space (64) unobstructed by pipe (5Q1) to perform uncemented pipe (5Q2) compaction within pipe (5Q3).

[0119] Downhole pipe disposal compaction may continue on the right side of Fig. 30 until the unobstructed space (64) is sufficiently below the top of cement (65.1) to, e.g., allow cement bond logging prior to placement of a cement P&A plug and/or the compaction of pipe (5Q1) within pipe (5Q2) to determine the top of cement (65.2) or a bottom of cement (66) from, e.g., a stage cement job between pipe (5Q3) and pipe (5Q4) having a cement top (65.3) can be close to the wellhead to provide ground (30) water isolation or well architecture support from seabed (31) to above sea level (32). After compacting the lower ends of pipe (5Q1) and/or pipe (5Q2), the upper end of pipe (5Q1) can be further compacted by hafting spears and urging them laterally and substantially adjacent within pipe (5Q2), which can be whole or previously compacted and hanging from the wellhead (29) to, e.g., dispose of pipe (5Q1) and, e.g., safety valves (41) and control lines (42) downhole, wherein the body and/or coupling of a downhole completion component (41), which in amalgamation comprise the pipe (5Q1), can be usable to fabricate a spearhead (2) of the present invention.

[0120] Prior art tools can be usable or adapted for operation and/or remote or self-actuation of hafting (7Q) or urging (13Q) tools, including associated functions of, e.g. : lubricating fluids (68) reducing kinetic buckling friction; forces applicable to differential pressures associated with hydrostatic pressures applied against trapped atmospheric pressure at a subterranean depth; temperature and/or temperature differentials, chemical reactions reagents, swelling, shrinking, explosions, liquificatioii, gasification, congealing, and/or dispersing fluids within passageways (8Q) and spaces (9Q). Prior art tools can also be amalgamated with separate tools or integrated mechanisms that can use transducers to provide signal data or power transmission of, e.g., electricity, mechanical energy, kinetic energy, chemical reaction energy and/or thermal energy to selectively haft or urge embodiments of the present invention. Signal data and/or analytical systems amalgamated with downhole tools or mechanisms run from above ground or seabed once or multiple times individually or as a campaign of hafting (7Q) and urging (13Q) tools can be usable to, e.g., overcome downhole resisting forces which can comprise injection pressure of fluids below a piston urging tool (13Q2) and resistances to scraping and cleaning the bore (6Q) or fluid injection resistance according to rock type, pore size/connection and/or fracture strength, fracture length, fracture reopening and overburden forces or regional stress planes. When reservoir rock (36.4) are production depleted their pressure can be less than a water hydrostatic gradient to provide a vacuum state that effectively aids compaction by sucking the piston (13Q) axiaily downward.

Force transfer from an urging tool comprising, e.g., a compaction piston (13), can be limited by various factors which include yield (19 of Fig. 13) and buckling strength (17) of cross-section and available equipment, e.g. pumping capacity (59 of Fig. 15), application of heavy (57) and viscous (56) fluids, material strength and associated pressure integrity of the piston (13Q), casing (3Q), cement (37) and strata (36). Accordingly, compaction force transfer can be limited by various factors which are not obvious because they are hidden within pipe containing the compaction and, thus, resisting frictional forces that can limit compaction length and associated unobstructed space (64) creation are also hidden; however, once discovered, it becomes obvious that the present invention can be usable to provide longer compaction lengths, albeit without compacting the most material into the least space. Fortunately, this is not necessarily limiting when 100 feet or 30 metre unobstructed spaces (64) can be sufficient within wells having thousands of feet or metres of pipe.

The surprising discover that using substantially stronger cross sections (11) and further splitting (15) of tubular pipe (5) during compaction to reduce friction prior to the insignificant or less significant final stages of folding, column bending, sinusoidal buckling and/or helical buckling cannot be reasonably construed to be an intuitive projection of prior art because reaching the point of tensile tear or shear (25 of Fig. 13) splitting (15) requires surpassing an ultimate yield strength that exceeds the plastic yield of catastrophic folding and, thus, it is not obvious how to reach tensile shearing without first incurring catastrophic yield (19, 24 of Fig. 13) folding. Accordingly, the present invention is distinct from and provides substantial benefit over prior art by increasing the length of unobstructed space (64) per compaction using the contrary method of stronger cross sections where buckling is limited to an elastic range by a geometry that cannot be observed during the practice of compaction to focus force at an edge to further split cut lengths and, thus, avoid plastic yielding and catastrophic folding of the inevitably cross braced cut lengths.

[0123] As demonstrated by the description and drawings provided herein, various combinations and/or permeations of the described embodiments are possible, wherein lessons of the described embodiments can enable various configurations or orientations of a compaction spear to be practiced. Accordingly, while various embodiments of the present invention have been described with emphasis, it should be understood that within the scope of the appended claims, the present invention might be practiced other than as specifically described herein,

[0124] Reference numerals have been incorporated in the claims purely to assist understanding during prosecution.