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7413033 |
A drill head is shown that provides improved steering in difficult ground conditions such as dry and compacted soil. A drill head is shown with features that include a narrow front portion, a sharp hardened insert such as a carbide point...
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7270198 |
The disclosed orienter for use in drilling a subterranean borehole enables use of the torque provided by the drilling motor to both orient the rotating drill bit for drilling an arcuate section of the borehole and rotating the orienter h...
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7243739 |
A coiled tubing directional drilling apparatus which is operated by a mud motor and is characterized by a fixed housing and a rotary steerable bent housing or sub which is selectively rotatable with respect to the fixed housing at a fixe...
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7225887 |
A method of drilling a borehole into an earth formation using a drill string having an upper part and a lower part which is more flexible than the upper part, the method involving drilling a first section of the borehole, drilling a seco...
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7207398 |
A rotary drill bit assembly suitable for directionally drilling a borehole into an underground formation, the drill bit assembly having a bit body extending along a central longitudinal bit-body axis, and having a bit-body face at its fr...
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7178611 |
According to one embodiment of the invention, a system for directional drilling within a wellbore includes a drill string having an upper portion, a lower portion, a bent motor coupled to the lower portion, and a drill bit coupled to ben...
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6991047 |
In accordance with one embodiment of the present invention, a method for drilling wellbores includes drilling a main wellbore and disposing a casing string in the main wellbore. The casing string has a deflecting member and a sealing mem...
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6978850 |
In one embodiment, a directional apparatus is disclosed for orienting and maintaining a desired orientation of a drill bit, which will be attachable to a drill string and include an asymmetrically weighted outer sleeve that is susceptibl...
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6920945 |
A method for facilitating horizontal drilling by positioning in a well casing a shoe defining a passageway extending from an upper opening in the shoe through the shoe to a side opening in the shoe. A rod is connected, through at least o...
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6913094 |
A leading body for a ground drilling machine is provided which includes a main body which is tapered at a front end thereof to form a first sloped surface and a second sloped surface on opposite sides of the front end of the main body. A...
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6763900 |
An orienter for controlling the drilling direction in a well. A main body 40, 23 is couplable to a drill string, and a nose tubing 50 is movably mounted by a universal joint in the main body. A collar 42 with a bore 43 engages in...
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6641634 |
A manual machine tool ( 10 ) includes a vacuum device for dust removal ( 19 ) situated in its housing ( 12 ) and a blow-out connection ( 20 ) installed after this. A dust collection box ( 21 ), particulaily self-contained, can be attache...
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6640910 |
A system for downhole drilling and coring includes a roller vane motor for driving a drill bit. The motor has a single jacket with a lower end and an upper end and being embodied such that all drilling fluid passes inside the jacket to t...
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6588517 |
Apparatus for boring a hole from an inside of a casing outwardly at an angle relative to a longitudinal axis of the casing comprises a drill shoe having a longitudinal axis and being positionable in the casing, the shoe having first and ...
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6550553 |
Apparatus for boring a hole from an inside of a tube outwardly perpendicular to a longitudinal axis of the tube comprises a drill shoe having a longitudinal axis and being positionable in the tube, the shoe having an inlet, an outlet per...
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6516902 |
Disclosed is a device for directional drilling including a drill head mounted on a drill column. A driving device applies an axial driving force to the drill column. A delivery device supplies a wash medium to the drill head through a ch...
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6464022 |
A mobile, horizontal directional boring apparatus and method is provided for boring from an existing utility manhole for the placement of small diameter fiber optic cabling. A mobile platform is located adjacent an existing utility manho...
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6419020 |
The hydraulic drilling method and system uses a tube bending tool attached at the down hole end of a pipe or stringer to direct a fluid tube in a generally horizontal direction from a generally vertical gas or oil well. The bending tool ...
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6412578 |
Apparatus for boring a hole from an inside of a casing outwardly at an angle relative to a longitudinal axis of the casing comprises a drill shoe having a longitudinal axis and being positionable in the casing, the shoe having first and ...
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6378629 |
Apparatus for boring a hole from an inside of a tube outwardly perpendicular to a longitudinal axis of the tube comprises a drill shoe having a longitudinal axis and being positionable in the tube, the shoe having an inlet, an outlet per...
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6308789 |
A drill bit that is arranged to change the direction of drilling. A cone head is rotatably mounted on a shank portion extending from an elongate housing. When the housing is rotated, the cone head generates a concave hole. When a change ...
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6125949 |
A method and apparatus for penetrating a well casing and surrounding earth strata includes the insertion of a flexible shaft having a ball cutter on an end thereof into upset tubing within a well casing. The upset tubing is provided with...
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6116356 |
A method and apparatus for reaming or enlarging a borehole with enhanced stability. A pilot stabilization pad (PSP) having an axially and circumferentially tapered entry surface and a circumferential transition surface thereabove is empl...
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RE36556 |
A method and apparatus for directional drilling to recover hydrocarbons, thermal energy, or the like, by using coiled tubing while the well is under pressure so that high density drilling fluids to control the subsurface pressures during...
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5941323 |
A drilling tool for use with a drill string into which drilling fluid is pumped. The tool comprises: a non-rotating housing having stabilizer blades on its outer surface; a rotating mandrel, passing through the housing; extendible blade ...
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5857531 |
The bottom hole assembly of the present invention includes a drill bit driven by a positive displacement drilling motor, the motor being constructed of tubular housings, one of said housings having a bend so as to cause the bit to drill ...
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5765653 |
A method and apparatus for reaming or enlarging a borehole with enhanced stability. A pilot stabilization pad (PSP) having an axially and circumferentially tapered entry surface and a circumferential transition surface above is employed ...
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5638910 |
A downhole sub for use in directional drilling with a bent sub attached to a drill bit. The drill bit is operated by a downhole motor. The downhole sub includes upper and lower tubular sections whose centers are offset from one another i...
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5601151 |
A hole opener comprising: a cylindrical section of pipe; a nose; a plurality of cutting elements that extend radially from the pipe and that produce a lateral force on the hole opener in response to the rotation of the hole opener in the...
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5555946 |
A method and a tool for use in commencing the drilling of a deviated well from a gap in the casing of a cased wellbore using a non-rotary drill string while maintaining the desired orientation of the drill bit by minimizing the effects o...
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5538092 |
A flexible drill pipe includes a plurality of hollow tubular pipe segments, having a longitudinal centerline, the segments being flexibly connected together, each connecting joint a type of joint that permits a limited universal movement...
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5469925 |
A tube turning tool allows laterals to be drilled and completed without the need for articulated bending tools, underreaming, high fluid pressure, or a separate running of completion tools. The turning tool uses a rigid bent pipe section...
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5443128 |
The present invention relates to a device for remote actuating an equipment through a variation of the flow of a fluid in a pipe. The device includes an adjusting throttle (2, 3; 52, 51) adapted for varying the opening of the passageway ...
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5441119 |
The invention relates to a directional drilling tool for use in controlled directional drilling. The drilling tool comprises two parts which are moveable relative to each other either in the horizontal or vertical planes. Cam surfaces ar...
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5423389 |
A rotary drill bit for drilling a curved subterranean borehole. In one embodiment, the drill bit comprises a side portion, a plurality of cutting elements that produce a lateral force on the drill bit in response to the rotation of the d...
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5368109 |
A system of apparatus for arcuate drilling into the earth is disclosed which comprises a drill string extending into a well bore in the earth and a fluid operated drill motor and drill bit operated thereby secured on the bottom end of th...
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5343967 |
A device for selective straight or directional drilling in subterranean rock formations consists of a rotary drilling tool having a tool main axis and comprising a housing which comprises several sections and can be connected to a drill ...
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5325714 |
A steerable motor system with integrated formation evaluation logging capacity is presented. The device comprises a housing, a formation resistivity logging tool, a surface signaling device, a density logging tool, a porosity logging too...
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5215151 |
A method and apparatus for directional drilling to recover hydrocarbons, thermal energy, or the like, by using coiled tubing while the well is under pressure so that high density drilling fluids to control the subsurface pressures during...
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5213168 |
A curve drilling assembly operable with a rotary drill string is provided for drilling a curved subterranean borehole. The assembly includes a curve guide, a rotary drill bit, an imbalance force assembly, and a bearing assembly. The curv...
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5154243 |
There is disclosed a bent sub comprising an outer tubular member connectible to the lower end of a drill string and an inner tubular member which is longitudinally reciprocable within the outer tubular member between retracted and extend...
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5099931 |
The present invention relates to a method and apparatus for navigational driling in earth formations, the apparatus including a downhole drilling assembly having a drill bit driven by a downhole motor and a deflection element or elements...
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5094305 |
An orientatable adjustable bent sub having a tubular member in the form of a adjustment sleeve, with a first and offset to a primary axis, telescopically receives the first end of the tubular member. By rotation of the adjustment sleeve ...
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5090496 |
A bent motor housing has a top end by which it is connected to the end of a drill string within a borehole and a bottom end on which a drill bit is mounted for drilling the borehole. A bend is provided intermediate the top and bottom end...
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RE33751 |
A system and method for controlled directional drilling utilizes a system approach to design the hardware for drilling according to the well plan. The bend angle of a bent housing, connected between the bit and downhole motor, the diamet...
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5065826 |
A device for selective straight or directional drilling in subterranean rock formations consists of a rotary drilling tool having a tool main axis and comprising a housing which comprises several sections and can be connected to a drill ...
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5042597 |
A method and apparatus for drilling highly deviated wells is disclosed. A drilling assembly is attached to a drill string. The drilling assembly includes a bent sub, a pony collar attached to the bent sub, a motor with a bent housing, an...
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5035292 |
A whipstock mill for milling through the casing wall which incorporates a pressure drop tattletale to signal the operator that the milling operation should be halted. The milling tool includes a longitudinal fluid passageway which commun...
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5022471 |
A deviated wellbore drilling system suitable for drilling curved wellbores which have a radius of curvature of approximately 10 to 1,000 feet relative to a vertical or near vertical wellbore comprises a drill string, a drill bit, and a f...
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4995465 |
A drilling method and apparatus for directional drilling of a borehole. The apparatus includes a retrievably mounted downhole monitor for sensing parameters of the drill rod to which a drill bit is attached. A bent-sub is connected with ...
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