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| Number | Title | Issue Date |
| 7407020 | Rotating systems associated with drill pipe Methods and apparatuses for drilling a borehole are disclosed. An electric motor electrically and mechanically coupled to a wired drill pipe is provided. The electric motor couples to a shaft that rotates when power is supplied to the electric motor. The shaft is co... | 08/05/2008 |
| 7353886 | Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion control valve,... | 04/08/2008 |
| 7258169 | Methods of heating energy storage devices that power downhole tools An energy storage device for powering a downhole tool may be heated to an effective temperature to improve the operability of the energy storage device. The energy storage device may comprise, for example, a primary battery, a secondary battery, a fuel cell, a capac... | 08/21/2007 |
| 7252162 | Method and device for injecting a fluid into a formation A method of injecting a stream of treatment fluid into an earth formation in the course of drilling a borehole into the earth formation, using an assembly having a drill string provided with at least one sealing means arranged to selectively isolate a selected part ... | 08/07/2007 |
| 7237626 | Tool module connector for use in directional drilling A tool module interconnect (10) for interconnecting to adjoining modules for insertion in a drill string features a system which permits making the electrical interconnection before assembly of the mechanical connections to interconnect the tool modules toget... | 07/03/2007 |
| 7222682 | Chain drive system A downhole tractor is provided that includes a motor, at least one rotatable screw powered by the motor, and a chain engageable with the at least one rotatable screw, whereby rotation of the at least one rotatable screw moves the chain. ... | 05/29/2007 |
| 7219722 | Apparatus and methods for powering downhole electrical devices A drilling system comprises a tubular member disposed in a wellbore having a downhole assembly disposed therein. At least one electrical device is disposed in the downhole assembly. A fuel cell is disposed in the downhole assembly and operatively coupled to the elec... | 05/22/2007 |
| 7204324 | Rotating systems associated with drill pipe Methods and apparatuses for drilling a borehole are disclosed. An electric motor electrically and mechanically coupled to a wired drill pipe is provided. The electric motor couples to a shaft that rotates when power is supplied to the electric motor. The shaft is co... | 04/17/2007 |
| 7201239 | Power-generating device for use in drilling operations A preferred embodiment of a power-generating device for use in drilling operations comprises a turbine comprising a housing, and a rotor assembly rotatably coupled to the housing so that the rotor assembly rotates in response to the passage of drilling mud therethro... | 04/10/2007 |
| 7188681 | Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion control valve,... | 03/13/2007 |
| 7188685 | Hybrid rotary steerable system A bottom hole assembly is rotatably adapted for drilling directional boreholes into an earthen formation. It has an upper stabilizer mounted to a collar, and a rotary steerable system. The rotary steerable system has an upper section connected to the collar, a steer... | 03/13/2007 |
| 7178601 | Methods of and apparatus for casing a borehole Methods of and apparatus for drilling, casing and/or completing a borehole wherein one or more portions of the borehole are drilled into a formation at a single diameter along the entire length or depth of the or each portion of the borehole. An expandable tubular m... | 02/20/2007 |
| 7178608 | While drilling system and method A while drilling system and method for determining downhole parameters is provided. The system includes a retrievable while drilling tool positionable in a downhole drilling tool, a sensor chassis and at least one sensor. The while drilling tool is positionable in t... | 02/20/2007 |
| 7178607 | While drilling system and method A while drilling system and method for determining annular pressure while drilling is provided. The system is positioned in a drilling tool suspended from a drilling rig via a drill string. The system includes at least one drill collar, a while drilling tool and at ... | 02/20/2007 |
| 7165634 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 01/23/2007 |
| 7147068 | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 12/12/2006 |
| 7141901 | Downhole torque-generating and generator combination apparatus A combination of a torque-generating apparatus with an alternator/generator. The torque-generating apparatus comprises a first assembly (10, 25) including a generally cylindrical member of magnetically soft material and having a longitudinal axis, and a secon... | 11/28/2006 |
| 7134512 | Method of downhole drilling and apparatus therefor A downhole drilling apparatus suspended by tubing includes a drill bit driven by an electric motor powered by a cable means. The motor is mounted upon a hollow shaft which allows fluid to pass through, so that a fluid circuit along the tube and back along the annulu... | 11/14/2006 |
| 7114970 | Electrical conducting system A generally tubular drill string has a conductive path over a plurality of drill pipe section (10). Each drill pipe section has a first end and a second end, and a wall, and the first end has a first radial sealing surfaces (11) and the second end has ... | 10/03/2006 |
| 7108083 | Apparatus and method for completing an interval of a wellbore while drilling An apparatus and method for completing an interval of a wellbore while drilling comprises a drill string (52) having a drill bit (30) mounted on the lower end thereof. A completion assembly (50) is positioned around a section of the drill string... | 09/19/2006 |
| 7093654 | Downhole component with a pressure equalization passageway The present invention includes a downhole component adapted for transmitting downhole data. The downhole component includes a threaded end on a downhole component. The threaded end furthermore includes an interior region, and exterior region, and a mating surface wh... | 08/22/2006 |
| 7093673 | Drilling device Method of introducing instruments/measuring equipment/tools into formations (9) in the earth's crust or other solid materials, such as ice, by means of a drilling device (1), material being liberated by, for example, rotation of a drill bit (2),... | 08/22/2006 |
| 7080700 | Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion control valve,... | 07/25/2006 |
| 7048050 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 05/23/2006 |
| 7044229 | Downhole valve device A downhole valve device (1) in a drill string (14) in a petroleum well (2) and method for maintaining optimal annular fluid velocity and wellbore pressure. The device comprises a valve housing (20) connected between adjacent segments (... | 05/16/2006 |
| 7036610 | Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th... | 05/02/2006 |
| 6997271 | Drilling string torsional energy control assembly and method The present invention provides a torsional energy control assembly and method for eliminating slip-stick and/or drill bit oscillations comprising axial and/or rotational oscillations. In one preferred embodiment, the assembly permits slippage between an upper portio... | 02/14/2006 |
| 6955231 | Tool for changing the drilling direction while drilling A tool adapted for changing the direction of drilling during drilling. The drilling equipment used in the drilling includes a drill string, a bent sub, a drill motor, and a drill bit. The tool is positioned between the drill string and the bent sub, includes housing... | 10/18/2005 |
| 6935423 | Borehole retention device A borehole retention assembly for anchoring a well tool within a wellbore including a gripping assembly and an actuation assembly. The gripping assembly includes expandable members such that upon expanding the expandable members, the gripping assembly engages the wa... | 08/30/2005 |
| 6926100 | Hole reaming apparatus and method An enhanced reaming apparatus and method are disclosed. A reaming assembly may have a motor and a pump that provide linear force, torsional force, and pressurized drilling fluid to a reamer to cause the reamer to enlarge the bore of a pilot hole. The reamer may have... | 08/09/2005 |
| 6920946 | Inverted motor for drilling rocks, soils and man-made materials and for re-entry and cleanout of existing wellbores and pipes An inverted motor with a drilling utensil attached to or integrated as part of an outer motor housing that rotates around a fixed non-rotating shaft or tube. The non-rotating shaft or tube is attached to a fixed base and can extend to the end or past the end of the ... | 07/26/2005 |
| 6857486 | High power umbilicals for subterranean electric drilling machines and remotely operated vehicles The method of providing in excess of 60 kilowatts of electrical power to the electrical motor of a subterranean electric drilling machine through a substantially neutrally buoyant composite umbilical containing electrical conductors to reduce the frictional drag on ... | 02/22/2005 |
| 6763887 | Drill pipe having an internally coated electrical pathway A method and apparatus for communicating to downhole oil or gas well equipment are provided. The apparatus includes a drill pipe for an oil or gas well including a generally cylindrical hollow drill pipe having an inner diameter, an outer insulative coating attached... | 07/20/2004 |
| 6745844 | Hydraulic power source for downhole instruments and actuators Disclosed is a system for using pressure differential between completion fluid in an oil well and produced fluids to power downhole devices, including instruments and actuators. A conduit is provided bypassing a packer which seals a production string to a well casin... | 06/08/2004 |
| 6679341 | Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion con... | 01/20/2004 |
| 6561289 | Bottomhole assembly and methods of use A bottomhole assembly (BHA) for use in well operations, with particular application to use in drilling with a downhole drilling motor and with coiled tubing and directional drilling, including a novel power pack, orienting tool, arrangement of bottomhole ... | 05/13/2003 |
| 6478097 | Electrically sequenced tractor A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assembly. The packerfeet... | 11/12/2002 |
| 6467557 | Long reach rotary drilling assembly A long reach rotary drilling assembly comprises an elongated conduit extending through a bore in an underground formation, a drill bit for being rotated to drill the bore, a 3-D steering tool on the conduit for steering the drill bit, and a tractor on the... | 10/22/2002 |
| 6347674 | Electrically sequenced tractor A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assembly. The packerfeet... | 02/19/2002 |
| 5725061 | Downhole drill bit drive motor assembly with an integral bilateral signal and power conduction path A downhole drill bit drive motor assembly which provides a bilateral low resistance path from the upper end of a downhole drill bit drive motor to the lower end of such a motor by employing an insulated wire or group of several wires through the rotor of ... | 03/10/1998 |
