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WO/2008/061100A1 |
A gripper mechanism for downhole tool is disclosed that includes a linkage mechanism and a flexible toe disposed over the linkage mechanism. In operation, an axial force generated by a power section of the gripper expands the linkage mec...
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WO/2008/051132A1 |
The present invention relates to a percussive down-the-hole hammer, a drill bit and a foot valve. The drill bit includes a body having a front drilling face, a central passage extending from a rear end of the body in a direction towards ...
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WO/2008/043985A2 |
A method is disclosed for running a completion string, such as casing, into a predrilled wellbore while allowing rotation of a downhole component with respect to the completion string. The downhole component may be a drill shoe (28) or r...
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WO/2008/041906A1 |
A percussion device (5) for a rock drilling machine (1) including a percussive piston (6; 15) which is reciprocally movable inside a cylinder and an impact receiving element (7;16) with an impact surface (A;A' ), against which the percus...
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WO/2008/024881A1 |
A tool (112) for moving within a passage (132) comprises an elongated body (207); a closed system (155) for converting a circulating flow of a fluid into movement of the tool (112) within the passage (132), and a pump-powering assembly. ...
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WO/2008/024856A1 |
A tool (112) for moving within a passage (132) comprises an elongated body (207), at least one gripper assembly (180, 182) engaged with the body (207), a turbine (150), and a power transmission assembly. The elongated body (207) has an i...
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WO/2008/024925A1 |
A fluid conduit sheath (18) for a wellbore tractor (10) can provide transportation of a working fluid external to a wellbore tractor in a downhole environment. The fluid conduit sheath can further provide cooling to electrical devices in...
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WO/2008/023089A1 |
Drilling device for drilling into ground, rock or for reaming a predrilled hole which drilling device comprises, if needed, a bit (2) which drills the central part of the hole and a hammer (1) for it, or the mentioned bit (2) is at least...
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WO/2008/016308A1 |
The present invention relates to an arrangement for the repeated mechanical triggering of various types of downhole equipment, the arrangement comprising a spring element (4) and a string section (1 ). The invention is characterized in t...
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WO/2008/015632A2 |
A technique that is usable with a well includes running a motor into the well and actuating the motor to turn a drill bit. The motor is used to pump well fluid from the well.
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WO/2008/007066A1 |
A fluid actuated downhole tool for inducing movement of a downhole apparatus is described. The tool comprises a body for coupling to downhole apparatus, the body being adapted to accommodate flow of fluid therethrough and including a flo...
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WO/2007/144157A1 |
Apparatus for drilling an underground borehole, comprising: - a tubular conveyance system (18) including an electric cable and a supply of drilling fluid, the supply of drilling fluid being arranged in use to pump fluid from the surface ...
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WO/2007/137424A1 |
An impulse rotor generator is provided for generating power in response to a primary mud flow in a drill string. The generator comprises a power rotor, at least one stationary magnetic pickup, and a pickup coil mounted on the at least on...
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WO/2007/134478A1 |
A mud shaft for fitting into an outer drill string (5) of a rotary percussive drilling rig (1) having an overburden percussion mechanism is described. In this case, the rotary percussive drilling rig (1) has a central chisel bit (3), whi...
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WO/2007/134748A1 |
A drilling system, comprising: a non-rotating conveyance system; a tool connected to the non-rotating conveyance system and including anchors by which the tool can be anchored in position when located in a borehole; a drill bit connected...
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WO/2007/129115A1 |
An apparatus for selectively orienting a bit (156) at the end of a drill string (135) in a wellbore (133), said apparatus connectable to a motive apparatus (127) for rotating said drill string (135) and said bit (156), said apparatus com...
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WO/2007/125358A1 |
A top drive apparatus for wellbore operations, the top drive apparatus comprising a main body (24a), a motor apparatus, a rotatable member (18) and a gear system driven by the motor apparatus for rotating the rotatable member, a sealing ...
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WO/2007/124567A1 |
A downhole drilling motor comprising a housing and a shaft extending within the housing, wherein the shaft is movable relative to the housing. Further, a conducting path extends within the housing between a first axial position and a sec...
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WO/2007/121510A1 |
A drive unit (40) for driving a kelly bar drilling arrangement (10), the drive unit (40) comprising a chassis (52) , the chassis carrying a kelly bar retriever (66, 68) for retrieving a kelly bar (10) from a hole or bore, the chassis (52...
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WO/2007/115124A2 |
An apparatus and method for transmitting outgoing data uses data descriptors for multiple sets of contiguous data blocks stored in buffers. When new sets of contiguous data blocks are created due to acknowledgement signals for particular...
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WO/2007/103686A1 |
An anchor features a mandrel (40) with ramps (42, 44) that extend through apertures (50, 52) in slip segments (46) giving the slips a longer ramp to ride out on in a radial direction. The slip segments have ramps (60, 62) adjacent the ap...
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WO/2007/091218A2 |
A downhole tool is provided that includes a grip assembly (312) for contacting a well formation. The grip assembly includes a gripper body (36); and a centralizer that is attached to and radially expandable with respect to the gripper bo...
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WO/2007/081253A1 |
A down-the-hole hammer includes a casing and a piston movable in the casing between a lowermost operating position and an uppermost operating position. A recess is provided between the piston and the casing so that the piston and the cas...
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WO/2007/077547A1 |
The present invention relates to a drill bit assembly for fluid-operated percussion drill tools. The assembly comprises a percussion bit (1) having a head portion (3) formed with an axially extending stub shank (32). A drive bush (2) is ...
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WO/2007/068103A1 |
According to one aspect of the invention there is provided a vibratory apparatus. The vibratory apparatus is comprised of a housing, an eccentric mass, a crankshift, a first member, a second member and an operating mechanism for rotating...
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WO/2007/064591A2 |
A wellbore motor includes a source of rotational motive power disposed in a wellbore, a magnetic gear member operatively coupled at an input thereof to the source; and a magnetic gear member output coupled rotationally to a rotary wellbo...
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WO/2007/062490A1 |
A fluid flow control means for a reverse circulation down hole hammer is disclosed. The down hole hammer is of the type that includes a piston that reciprocates within a hammer barrel to repeatedly impact a drill bit by high pressure flu...
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WO/2007/057055A1 |
The invention relates to a hammer drilling device with a pneumatic reversing gear. Said device comprises a hammer piston (8) that is situated in a housing (1) and is displaced back and forth with the aid of air supplied via an air condui...
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WO/2007/054353A2 |
The invention relates to an earth boring device with a housing (1), which has an internal thread (11) in at least one section, and with a threaded element with a corresponding external thread, the threaded element being slotted and havin...
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WO/2007/056035A1 |
In representative embodiments, a backhead for a drill assembly comprises an elongate member having a proximal end connectible to a source of pressurized fluid, a side wall defining an axial bore and an open distal end. A portion of the b...
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WO/2007/056007A2 |
A pressure fluid actuated downhole percussion tool includes a reciprocating piston hammer with differential transverse pressure surfaces cooperable with a cylinder housing, a guide sleeve and a bit carried exhaust tube to form opposed pr...
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WO/2007/050161A2 |
Disclosed herein is a device that relates to a downhole tool (10). The tool comprising, a tool body (14) having first (24) and second (26) support portions, and at least one extendable assembly (18) pivotally mounted between the first an...
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WO/2007/050770A1 |
A method for drilling a well in a formation including inserting a thruster (106) , a first conduit (104) , and a drill bit (105) into a wellbore (101) lined with a previous casing (103) and applying a force to the first conduit with the ...
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WO/2007/044223A2 |
A loudspeaker system consisting of a plurality of direct-radiating electro- acoustical drivers arrayed along a curved line. While in one embodiment the curved line array may be a spiral array, in another embodiment it may be any curved l...
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WO/2007/034462A1 |
The present invention relates to a percussion hammer for enlarging drilled holes. The hammer comprises an external outer wear sleeve (5), an inner cylinder (7) mounted co- axially within the outer wear sleeve (5) , a tubular torque shaft...
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WO/2007/026308A2 |
A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the ...
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WO/2007/025117A1 |
Bearing apparatuses including contacting bearing surfaces having superhard materials are disclosed. In one embodiment, the present invention relates to bearings including polycrystalline diamond inserts or compacts defining a plurality o...
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WO/2007/017046A1 |
A drilling system for drilling a borehole in an underground formation, comprises a rotary drill bit, a drilling drive mechanism that is capable of applying both rotating the drill bit and applying an axial force to the drill bit, and a c...
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WO/2007/010513A1 |
The invention relates to a drill bit assembly for fluid-operated percussion drill tools comprising a percussion bit (1) having a head portion (3) formed with an axially extending stub shank (32). The stub shank is provided with axially e...
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WO/2007/001187A1 |
A hydraulic hammer is built up around an inner cylindrical string section (1) and an outer cylindrical mantle consisting of cylindrical sections (4, 6) , and (8) connected to adapters (5) and (7). The impact hammer is driven by liquid pr...
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WO/2006/134446A2 |
An activating mechanism for controlling the operation of a downhole tool in a drill string and which is intended to be housed in a portion of the drill string upstream of the downhole tool, in which: the activating mechanism has a first ...
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WO2006088743B1 |
Radial expansion of a wellbore casing against a formation.
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WO/2006/126886A1 |
The present invention relates to a device for the selective movement of a well tool (20, 20', 40) in or through at least a portion of a pipe string (2), said at least one portion of the pipe string (2) being provided with a plurality of ...
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WO/2006/119008A2 |
A method and apparatus for changing the speed of a drill bit down hole in a fluid- actuated motor, including a positive displacement motor and a hydraulic motor, is disclosed. The apparatus comprises a bypass valve installed in the motor...
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WO/2006/116646A2 |
A bit assembly (10) for a precussive drill (1) includes a casing (2) with an interior chamber (3) and a bit (12) connectable with the casing 92) and having a bore (13). The bore (13) has a retainer portion (16) with a conical surface ext...
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WO/2006/089617A1 |
Apparatus for drilling operations in underground boreholes, comprises: a drilling assembly that can be located in a borehole and is moved along the borehole during the drilling operation; a flexible fluid supply line connected to and in ...
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WO/2006/089349A1 |
An apparatus for driving a' shaft (12) in an excavating device comprising a plurality of linear actuating devices (19, 20, 21) driven by fluid, a wobble plate device (14, 15, 16) coupled to a shaft and a coupling means (17, 18) coupling ...
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WO/2006/082421A1 |
The present invention provides an apparatus (10) and method for transmitting torque to a downhole device. The apparatus (10) comprises a first part and a second part adapted for connection to the downhole device. The apparatus (10) also ...
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WO/2006/058363A1 |
A latch body (10) incorporates spring-loaded latches (11) and (12) which secure the inner tube assembly in place by latching against a shoulder in an adaptor coupling. At the lower end of the latch body (10) there are water inlet ports (...
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WO/2006/054949A1 |
The present invention relates to a percussion device including a hammer piston, and including a valve 9 for controlling the reciprocating movement of the hammer piston in a cylinder. The control is obtained by pressurization chambers in ...
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