A METHOD FOR FACILITATING CONSTRUCTION OF A DRILLING RIG The present invention relates to a drilling rig and a method for facilitating construction of a drilling rig and particularly, but not exclusively, to a method for facilitating installation of a drawworks in a drilling rig.

The prior art discloses a variety of rigs used in drilling and various wellbore operations ; for example , and not by way of limitation, U.S. Patents 3,340,938;

3,807,109; 3,922,825; 3,942,593; 4,269,395; 4,290,495;

4,368,602; 4,489,526; 4,569,168; 4,837,992; 6,634,436;

6,523,319; and 7,306,055 and the references cited in these patents - all these patents incorporated fully herein for all purposes . The prior art discloses a variety of systems and methods for assembling and raising components of a drilling rig; for example, and not by way of limitation nor as an exhaustive listing, the disclosures in U.S. Patents: 2,993,570; 3,201,091; 3,262,237; 3,749,183; 4,221,088; 4,269,009; 4,292,772;

4,305,237; 4,478,015; 4,587,778; 4,630,425; and

4,932,175.

Often drilling rigs and related systems, equipment, and apparatuses are delivered to a site, assembled, raised, disassembled, and transported to a new site. It is important that drilling rigs and their components be easily transported, assembled, and installed.

Often rig components such as a drawworks (or other equipment) are raised by a crane, positioned on a rig's drill floor, and then secured to the drill floor.

Various problems and disadvantages are associated with a drawworks installation that requires using a crane.

In accordance with the present invention, there is

provided a method for installing a drawworks on a drilling rig structure , the method comprising the steps of moving a drawworks on movement apparatus along ground adjacent a drill floor of a drilling rig structure , the drilling rig structure having a substructure and raising apparatus on the substructure for raising the drill floor, raising the drill floor with the drawworks using the raising apparatus of the substructure. Other apparatus such as a driller' s cabin can be placed on the drill floor before the drill floor is raised to operational working height.

Preferably, the drawworks comprises a skid. The winch, motors, gearbox, drum and preferably a line wrapped around the drum sitting of the skid. Advantageously, a top of the skid is substantially level with a top surface of the drill floor.

Preferably, the drawworks is rotatably mounted on the movement apparatus , the method further comprising the step of rotating the drawworks with respect to the movement apparatus (T, R) prior to connecting the drawworks (10) to the drill floor. Preferably, the drawworks is arranged on a bearing. Advantageously, the drawworks comprises upper and lower skids with a bearing therebetween . Advantageously, the drawworks has drawworks connection apparatus and the drill floor has drill floor connector structure, the method further comprising the step of raising the drill floor to connectingly engage the drill floor connector structure with the drawworks connection apparatus to connect the drawworks to the drill floor. Advantageously, when the drawworks connectingly engages the drill floor, the drawworks is prevented from falling from the drill floor and

preferably inhibited from lateral movement. Preferably, the drawworks connection apparatus is fixed to the skid.

Preferably, one of the drawworks connection apparatus and the drill floor connector structure comprises a hook and the other of the drawworks connection apparatus and the drill floor connector structure comprises a receiver member to be received by the hook. Preferably, the receiver member is a bar or pin held by at least one lug to the drill floor or drawworks. Advantageously, the pin or bar is welded to the lug.

Advantageously, the method further comprises the step of moving the movement apparatus away from the rig.

Preferably, the method further comprises the step of securing the drawworks with a securement device. Preferably, the securement device is arranged between the drawworks and the substructure. Advantageously, the securement device is a rigid member, such as a steel pole or beam, which may be adjustable in length or may have a fixed length. Advantageously, the method further comprises the step of raising the drill floor with the drawworks thereon to a desired operational height.

Advantageously, the drill floor has an interior open space into which at least a part of the movement apparatus is selectively movable, the method further comprising the step of moving the drawworks on the movement apparatus into the interior open space of the drill floor on the movement apparatus prior to connecting the drawworks to the drill floor. The interior open space may be an open bay in the drill floor, the bay having an open end and three sides bounded by the drill floor.

Preferably, the drawworks is connected to the drill floor by inserting a pin through an opening in lug. The

pin may be fixed to the drill floor.

Advantageously, the movement apparatus is an articulated truck comprising a tractor unit and a trailer with the drawworks on the trailer. The movement apparatus may be a barge, an engine and carriage on a track or the like.

Preferably, the drill floor comprises an extension apparatus extendable to engage the drawworks, the method further comprising the step of extending the extension apparatus from the drill floor to engage the drawworks . Preferably, the extension apparatus engages a skid of the drawworks and is connected thereto by any of the connection apparatus described herein, such as a hook and bar arrangement. Advantageously, the method further comprises the step of retracting the extension apparatus to move the drawworks towards the drill floor.

The present invention also provides a method for installing a drawworks on a drilling rig on ground, wherein a drawworks is carried on movement apparatus on ground adjacent a drill floor of a drilling rig structure, the drilling rig structure having a substructure having a raising apparatus, the drill floor having an interior open space the method comprising the steps of moving the drawworks into the interior open space of the drill floor on the movement apparatus , and connecting the drawworks to the drill floor.

Preferably, the method further comprises the step of raising the drill floor with the drawworks connected thereto using the raising apparatus. Advantageously, the method comprises the step of raising the drill floor to engage the drawworks, preferably, lugs of the drawworks which may extend outwardly from a main body of the drawworks or from a skid of the drawworks , to facilitate

connection of the drawworks to the drill floor.

The present invention also provides a drill floor for a drilling rig, the drill floor comprising a floor section with an interior open space into which at least part of a movement apparatus is selectively movable with a drawworks thereon, and a drill floor connector structure on the drawworks for connection to corresponding connection structure of the drill floor. Preferably, the foot print of the drawworks takes up a significant portion of the footprint of the interior open space. Advantageously, the footprint of the drawworks takes up all of the footprint of the interior open space.

The present invention also provides a method for installing a apparatus on a drilling rig structure , the method comprising the steps of moving an apparatus on movement apparatus along ground adjacent a drill floor of a drilling rig structure, the drilling rig structure having a substructure and raising apparatus on the substructure for raising the drill floor, raising the drill floor with the apparatus using the raising apparatus of the substructure.

Thus the present invention provides method for installing apparatus such as a drawworks on a drilling rig structure in the construction of a drilling rig. , without using a crane or cables .

The present invention, in certain aspects, provides a drilling rig with a drawworks (or other equipment or apparatuses) and methods for installing a drawworks (or other equipment or apparatuses) on a drilling rig using a vehicle to move the drawworks adjacent the rig and then connecting the drawworks (or other equipment or apparatuses) to the rig.

In certain aspects , the present invention discloses

methods and systems for installing a drawworks (or other equipment or apparatuses) on a drilling rig, the method, in certain aspects , including moving a drawworks on movement apparatus on the ground adjacent a drill floor of a rig, connecting the drawworks to the drill floor, moving the movement apparatus away from the rig, and raising the drill floor with the drawworks thereon using raising apparatus of a rig substructure supporting the drill floor

For a better understanding of the present invention, reference will now be made, by way of example, to the accompanying drawings , in which :

Figure IA is a side view of a drawworks in accordance with the present invention;

Figure IB is a bottom view of the drawworks shown in Figure IA;

Figure 1C is a view in cross-section of a telescoping beam of the drawworks shown in Figure IA; Figure ID is an end view partially cut-away of the drawworks shown in Figure IA;

Figure IE is an enlarged view of part of the drawworks shown in Figure ID;

Figure IF is a side view of a lower skid of the drawworks shown in Figure IA;

Figure IG is a top view of the lower skid shown in Figure IF;

Figure 2A is a side view of the drawworks shown in Figure IA on a trailer of a truck, illustrating a step in a method in accordance with the present invention for installing a drawworks on a drilling rig structure;

Figure 2B is a side view illustrating a step following the step shown in Figure 2A;

Figure 2C is an enlarged view of part of the drawworks shown in Figure 2B;

Figure 2D is a top view of the drawworks shown in Figure 2B;

Figure 2E is a top view of the drawworks on the trailer of the truck illustrating a step in a following the step shown in Figure 2B approaching a drilling rig structure of a drilling rig (not shown) ;

Figure 2F is a side of the view of the drawworks on the trailer of the truck approaching the drilling rig

structure of a drilling rig illustrating a step following the step shown in Figure 2B;

Figure 2G is an enlarged side view of part of the drawworks and drilling rig structure shown in a step following the step shown in Figure 2F;

Figure 2H is an enlarged view of part of the drawworks and drilling rig structure shown in a step following the step shown in Figure 2G;

Figure 21 is a side view the drawworks and drilling rig structure shown in the step shown in Figure 2H;

Figure 2J is a top view of the drawworks and drilling rig structure in the step shown in Figure 21;

Figure 2K is a side view of part of the drawworks on the trailer of the truck and drilling rig structure shown in a step following to the step shown in Figure 21;

Figure 2L is a side view of part of the drawworks lifted from the trailer of the truck by the drilling rig structure and the truck and trailer moved away from the drilling rig structure in a step following to the step shown in Figure 2K;

Figure 2M is an enlarged view of part of the drawworks and drilling rig structure shown in the step of Figure 2L;

Figure 2N is a side view of the drilling rig structure and drawworks in a step following the step of Figure 2M;

Figure 20 is a side view of the drilling rig structure and drawworks in a step following the step of Figure 2N; Figure 3A is a side view of the drawworks on a trailer of a truck, illustrating a step in a method in accordance with the present invention for installing a drawworks on a drilling rig structure;

Figure 3B is an end view of the drawworks on the trailer of the truck next to a drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 3A; Figure 3C is an end view of the drawworks on the trailer of the truck next to the drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 3B;

Figure 3D is an end view of the drawworks on the trailer of the truck next to the drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 3C;

Figure 3E is an enlarged view of part of the drawworks and drilling rig structure shown in the step shown in Figure 3D;

Figure 3F is an end view of the drawworks on the trailer of the truck next to the drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 3E; Figure 3G is an enlarged view of part of the drawworks and drilling rig structure shown in a step shown in Figure 3F;

Figure 3H is an enlarged view of part of the drawworks and drilling rig structure shown in a step shown in Figure 3F;

Figure 31 is an end view of the drawworks attached the drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 3F; Figure 3J is an end view of the drawworks attached to the drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 31;

Figure 3K is an end view of the drawworks attached to the drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 3J; Figure 4A is a side view of a drawworks in accordance with the present invention;

Figure 4B is an end view of the drawworks shown in Figure 4A;

Figure 4C is a top view of the drawworks shown in Figure 4A;

Figure 4D is a view in cross-section taken along line 4D-4D of Figure 4C;

Figure 5A is a side view of the drawworks on a trailer of a truck, illustrating a step in a method in accordance with the present invention for installing a drawworks on a drilling rig;

Figure 5B is an end view of the drawworks on the trailer of the truck next to a drilling rig structure of a drilling rig, illustrating a step following the step shown in Figure 5A;

Figure 5C is an side view of the drawworks on the trailer of the truck reversed into a bay in the drilling rig structure, illustrating a step following the step shown in Figure 5B; Figure 5D is a top view of the drilling rig structure in the step shown in Figure 5B;

Figure 5E is a side view of the drilling rig structure in the step shown in Figure 5D;

Figure 5F is an end view of part of the structure shown in Figure 5D;

Figure 5G is a top view of the drilling rig structure and drawworks shown in the step of Figure 5C;

Figure 5H is an enlarged side view of par t of the

drawworks and drilling rig structure shown in Figure 5G;

Figure 51 is a enlarged side view of part of the drawworks and drilling rig structure shown in Figure 5G;

Figure 5J is a side view of the drawworks fixed to the drilling rig structure, and truck and trailer moved therefrom illustrating a step following the step shown in Figure 5A; and

Figure 5K is a side view of the drawworks fixed to the drilling rig structure, illustrating a step following the step shown in Figure 5J.

Figures IA to ID show a drawworks 10 in accordance with the present invention. The drawworks 10 has a housing 12 on an upper skid 14. The upper skid 14 has an upper bearing 16 which is rotatable around a lower bearing 17. The lower bearing 17 supports the upper skid 14. The lower bearing 17 is mounted on a lower skid 18. The upper skid 14 is rotatable on the lower bearing 17 to rotate the drawworks 10. It is to be understood that it is within the scope of the present invention to move, lift, and connect any equipment (to include apparatuses, systems, devices, or a rig structure) with systems and method in accordance with the present invention.

Connected to the lower skid 18 are four telescoping beams 21, 22, 23, 24 each with an inner beam part that can be released and extended. Figure 1C shows the beam 21 with a pin hole 21c, an outer beam part 21a and an inner beam part 21b. For transport, for example on a trailer, the inner beam parts are extended so that the drawworks does not rotate . Figures 2A to 2C illustrate steps in a method in accordance with the present invention with a drawworks 10. As shown in Figure 2A the drawworks 10 is supported on a movement apparatus movable on the ground G such as a

trailer R pulled by a truck T . During transport the four telescoping beams 21 to 24 are extended to inhibit movement of the drawworks relative to the trailer R. Upon arrival near a drilling rig structure 20, the telescoping beams 21 to 24 are raised and pinned in place with pins 25 (Figure 2C) to allow rotation of the drawworks 10 relative to the trailer R. The drawworks 10 is rotated on the bearings 16, 17 ninety degrees (or any desired angle) (see Figure 2E) . The telescoping beams 21 to 24 are then extended (as in Figure 2F) .

As shown in Figure 2F, the truck T backs up the trailer R to the drilling rig structure 20. The drilling rig structure 20 has a drill floor 28 and a substructure 26 with pivotable supports 26s, preferably two such pivotable supports each side of the substructure 26, that supports and are selectively raised and lowered with the drill floor 28. The drill floor 28 comprises structural elements, such as beams, I-beams and box girders and a partly panelled floor. The trailer R is backed up so that the drawworks 10 is almost flush with the drill floor 28. Using powered hydraulic cylinder apparatuses 29a of the substructure 26, the drill floor 28 is raised (see Figure 2G) until a pin connection 27 of the drill floor 28 is received and holds the inverted hook connection 11 of the drawworks 10 (see Figures 2G, 2H, 21) . Then, the drawworks 10 is lifted off the truck by raising the drill floor 28 relative to the substructure 26 (Figure 2K) .

As shown in Figure 2J and 2K, the drill floor 28 may be lowered so that pins 37 (one on each side) pin together the drawworks 10 and the drill floor 28. Alternatively, the pins 37 may be inserted while the drawworks is suspended on the inverted hook 11 / pin connection 27. The drawworks 10 is lifted from the

trailer R by raising the drill floor 28 and the truck T then moves away with the trailer R (see Figure 2L) . Support legs 39 are pivotally connected to the lower skid 18 of the drawworks 10 (see Figure 2N) . A lower end of the support legs 39 is initially allowed to rest on the ground G as the drill floor 28 is raised. A support leg 39 is arranged on a distal part of each end of the drawworks 10 to the drill floor 28.

As shown in Figure 20, the powered hydraulic cylinder apparatuses 29a of the substructure 26 raises the drill floor 28 with the drawworks 10 to a final desired height. The support leg 39 is then connected with a pin to the substructure 56 to securely support or provide additional support or stability to the drawworks 10.

A mast raising cylinder apparatus 38 is used to raise a mast (not shown) . In one aspect, the mast is as in the U.S. Patent Application No. 12/074,258 entitled DRILLING RIG MASTS AND METHODS OF ASSEMBLY, co-owned with the present invention, filed on 29 ^th February 2008 with the application for this patent, and fully incorporated herein for all purposes. The legs 39 are pinned in place to the bottom of the substructure 26.

Figures 3A to 3J illustrate a method in accordance with the present invention using hook connection/pin- connection connectors as described above and a telescoping beam extendable from a rig substructure to connect to a drawworks and cantilever a drawworks from a movement support such as a trailer pulled by a truck. As shown in Figure 3A a truck K on the ground D has a trailer C attached thereto with a drawworks 40 on a skid 45 supported on the trailer C. The drawworks 40 has two hook structures 41 with hooks 41a (see Figure 3E) . A

substructure 56 has pin connection structures 57 with connection pins 57a (see Figure 3E) on each of two telescoping beams 52 (one shown, Figure 3C; the other opposite and spaced-apart from the one shown on the other side of the substructure) . A drill platform raising cylinder assembly 56c of the substructure 56 raises and lowers a drill floor 58. The drill floor 58 comprises structural elements, such as beams, I-beams and box girders and a partly panelled floor. The substructure includes a plurality of pivotably connected supports 56s.

The truck K moves the drawworks 40 alongside the drill floor 58 (Figure 3B) . Parts 52a of the beams 52 are extended for engagement with the hook structures 41 of the drawworks 40. Hydraulic cylinder apparatuses 53 are used to extend the beam parts 52a.

As shown in Figure 3D, the drill floor 58 is raised by the substructure raising cylinder assembly 56c until the pins 57a of the pin connection structures 57 are moved into the hooks 41a of the hook structures 41. As shown in Figure 3F, the drill floor 58 is then lowered and pins 57b are inserted into holes in the substructure 56 and holes in the drawworks 40 to pin the substructure 56 to the drawworks 40 (Figure 3G) . To insure that the top of the skid 45 is level with the panelled floor of the drill floor 58, the drill floor 58 is lowered an appropriate amount. As shown in Figure 31, the telescoping beams 52 are retracted by the powered cylinder apparatus 53, bringing the skid 45 flush in close proximity with the drill floor 58. Once the substructure 56 is connected to the drawworks 40, the substructure 56 is raised to lift the drawworks 40 off the trailer C and the truck K and trailer C are moved away.

The drill floor 58 with the drawworks 40 secured thereto is then lowered so that two support legs 55 (one shown in the view in Figures 3J, 3K; another not shown spaced-apart from and parallel to the one shown) can be connected to the drawworks skid 45 (Figure 3J) . With the legs 55 connected, the substructure raising cylinder assembly 56c raises the drill floor 58 and the drawworks 40 attached thereto to a working height (Figure 3K) . Lower ends of the legs 55 are connected to a base 56b of the substructure 56. A BOP beam 56r is connected to depends from structural elements of the drill floor 58.

Figures 5A to 5H illustrate a method in accordance with the present invention for installing a drawworks 60

(see Figures 4A to 4D) on a drill floor 78 of a substructure 76. The drawworks 60 is on a skid 65 and, initially, is supported on a trailer F pulled by a truck V on ground N. The substructure 76 has a base 76b to which are connected powered hydraulic cylinder apparatuses 79a, a mast raising cylinder apparatus 79b, and a plurality of pivotable supports 76s which support a drill floor 78. Bottom ends of the apparatuses 79a and 79b, and of the supports 76s are pivotably connected to the base 76b. Top ends of the apparatus 79a and supports 76s are pivotably connected to the drill floor 78. Pins 77 (as discussed below) are used to pin the drawworks skid 65 to the substructure's drill floor 78. The drill floor 78 has an open space 78s into which a drawworks can be moved and into which a vehicle, for example a truck/trailer combination, can move for example to move a drawworks into place or any other equipment, structure apparatus , or device .

As shown in Figures 5A, 5B, and 5C the truck V moves the drawworks 60 adjacent the substructure 76 and into

the space 78s in the drill floor 78. With the drawworks 60 in position, pins 77 are inserted through holes in four drawworks lugs 63 and into corresponding holes 75 in the drill floor 78. Lock pins 79 are installed through a beam 71 of the drill floor 78 into the skid 65. Upon securement of the drawworks 60 to the drill floor 78 (and release from the trailer F) , the truck V and trailer F are moved away (Figure 5J) .

The cylinder apparatus 79a (one shown in Figures 5B and 5K; another not shown spaced-apart from and parallel to the one shown) then raises the drill floor 78 with the drawworks 60. No crane is used to install the drawworks 60 , no cables are connected and winched upwardly for the installation, and the size of the drill floor 78 can be reduced since the drawworks 60 is integrated into and connected to an end of the drill floor 78; the skid 65 continues to support the drawworks following connection to the drill floor 78, and no part of the drill floor is needed beneath the skid 65 for this support. The present invention, therefore, provides in some, but not in necessarily all, embodiments methods for installing a drawworks (or other rig apparatus, for example equipment, device, system, apparatuses) on a drilling rig, the methods including: moving a drawworks on movement apparatus on the ground adjacent a drill floor of a rig, the rig having a substructure and raising apparatus on the substructure; connecting the drawworks to the drill floor; and raising the drill floor with the drawworks thereon using the raising apparatus of the rig substructure. Such methods may one or some, in any possible combination, of the following: the drawworks is rotatably mounted on the movement apparatus, the method including rotating the drawworks with respect to the

movement apparatus prior to connecting the drawworks to the drill floor; the drawworks having drawworks connection apparatus and the drill floor has drill floor connector structure, the method further including raising the drill floor to connectingly engage the drill floor connector structure with the drawworks connection apparatus to connect the drawworks to the drill floor; moving the movement apparatus away from the rig; wherein a securement device secures the drawworks to the drill floor, the method further including securing the drawworks to the drill floor with the securement device; raising the drill floor with the drawworks thereon to a desired operational height; wherein the drill floor has an interior open space into which a movement apparatus is selectively movable with the drawworks thereon, the method further including moving the drawworks into the interior open space of the drill floor on the movement apparatus prior to connecting the drawworks to the drill floor; wherein the movement apparatus is a truck-trailer combination with the drawworks on a trailer of the truck- trailer combination, the trailer connected to and movable by a truck of the truck-trailer combination; the drawworks connection apparatus is hook apparatus for connection to a corresponding pin structure, and the drill floor connector structure includes a corresponding pin structure engagable by the hook apparatus; the drawworks is connected to a drawworks skid, the drawworks connection apparatus includes a plurality of lugs spaced- apart on and projecting from the skid, each lug having a lug hole, the drill floor connector structure including a drill floor hole in the drill floor corresponding to each lug hole, the method further including connecting the drawworks to the drill floor by emplacing a pin with

respect to each lug hole and drill floor hole so that a first portion of the pin is in the lug hole and a second portion of the pin is in the drill floor hole; wherein the drawworks includes a skid, the method further including connecting the drawworks to the drill floor so that a top of the skid is substantially level with the drill floor; the substructure includes extension apparatus extendable to engage the drawworks, the method further including extending the substructure extension apparatus from the substructure, and engaging the drawworks with the substructure extension apparatus; and/or retracting the substructure extension apparatus while it is engaging the drawworks to move the drawworks to the drill floor. The present invention, therefore, provides in some, but not in necessarily all, embodiments a method for installing a drawworks (or rig apparatus) on a drilling rig, the method including moving a drawworks on movement apparatus on the ground adjacent a drill floor of a rig, the rig having a substructure and raising apparatus on the substructure; connecting the drawworks to the drill floor; and raising the drill floor with the drawworks thereon using the raising apparatus of the rig substructure; wherein the drawworks has drawworks connection apparatus and the drill floor has drill floor connector structure, raising the drill floor to connectingly engage the drill floor connector structure with the drawworks connection apparatus to connect the drawworks to the drill floor, moving the movement apparatus away from the rig, wherein a securement device secures the drawworks to the drill floor, securing the drawworks to the drill floor with the securement device, raising the drill floor with the drawworks thereon to a

desired operational height, and wherein the movement apparatus is a truck-trailer combination with the drawworks on a trailer of the truck-trailer combination, the trailer connected to and movable by a truck of the truck-trailer combination.

The present invention, therefore, provides in some, but not in necessarily all, embodiments a method for installing a drawworks on a drilling rig on ground, the method including: moving a drawworks on movement apparatus on ground adjacent a drill floor of a rig, the rig having a substructure and raising apparatus on the substructure; wherein the drill floor having an interior open space into which a movement apparatus is selectively movable with the drawworks thereon; moving the drawworks into the interior open space of the drill floor on the movement apparatus ; and connecting the drawworks to the drill floor. Such a method may one or some, in any possible combination, of the following: raising the drill floor with the drawworks thereon using the raising apparatus of the rig substructure; the drawworks has drawworks connection apparatus and the drill floor has drill floor connector structure, the method further including raising the drill floor to connectingly engage the drill floor connector structure with the drawworks connection apparatus to connect the drawworks to the drill floor; wherein a securement device secures the drawworks to the drill floor, the method further including securing the drawworks to the drill floor with the securement device; and/or wherein the drawworks includes a skid, the method further including positioning the drawworks with respect to the drill floor so that a top of the skid is substantially level with the drill floor.

The present invention, therefore, provides in some, but not in necessarily all, embodiments a drill floor including the drill floor having a floor section with an interior open space into which a movement apparatus is selectively movable with a drawworks thereon, and drill floor connector struetrue on the drawworks for connection to corresponding connection structure on a drawworks, the drill floor connector structure movable to engage a drawworks connection apparatus to connect a drawworks to the drill floor.

The present invention, therefore, provides in some, but not in necessarily all, embodiments a method for installing a rig apparatus on a drilling rig, the method including: moving a rig apparatus on movement apparatus on the ground adjacent a drill floor of a rig, the rig having a substructure and raising apparatus on the substructure; connecting the rig apparatus to the drill floor; and raising the drill floor with the rig apparatus thereon using the raising apparatus of the rig substructure; wherein the rig apparatus has rig apparatus connection apparatus and the drill floor has drill floor connector structure; raising the drill floor to connectingly engage the drill floor connector structure with the rig apparatus connection apparatus to connect the rig apparatus to the drill floor; moving the movement apparatus away from the rig; wherein a securement device secures the rig apparatus to the drill floor; securing the rig apparatus to the drill floor with the securement device; raising the drill floor with the rig apparatus thereon to a desired operational height; and wherein the movement apparatus is a truck-trailer combination with the rig apparatus on a trailer of the truck-trailer combination, the trailer connected to and movable by a

truck of the truck-trailer combination.

The systems and methods of the inventions described in the following pending U.S. Patent Applications, co- owned with the present invention, filed on even date herewith, naming Donnally et al as inventors, and fully incorporated herein for all purposes , may be used with certain embodiments of the present invention, the applications entitled: "Drilling Rig Masts And Methods Of Assembly and Erection" ; "Drilling Rig Structure Installation And Methods"; and "Drilling Rigs and Erection Methods".