Electric Patents (Class 175/104)
  • Patent number: 9822587
    Abstract: A downhole rotational rate control apparatus, adapted for coupling to the lower end of a drill string, includes a progressive cavity pump or motor, a mud flow control valve, and an electronics section. Drilling mud flowing downward through the drill string is partially diverted to flow through the pump or motor, with the mud flow rate and, in turn, the pump or motor speed being controlled by the mud flow control valve. The control valve is actuated by a control motor in response to inputs from a sensor assembly in the electronics section. By varying the rotational rate of the pump or motor relative to the rotational rate of the drill string, the tool face orientation or non-zero rotational speed of the controlled device in either direction can be varied in a controlled manner.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: November 21, 2017
    Assignee: Dreco Energy Services ULC
    Inventors: Jonathan Ryan Prill, Nicholas Ryan Marchand, Ralph William Graeme Johns
  • Patent number: 9765613
    Abstract: A drilling system including a drill string, an EM telemetry assembly, and an electric contact assembly that defines an electrical connection with the drill string. The electric contact assembly permits a portion of the EM tool to slide along a portion of the drill string during drill string assembly.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: September 19, 2017
    Assignee: APS Technology, Inc.
    Inventors: David Cramer, Andrew Roberts
  • Patent number: 9752385
    Abstract: A pipe in pipe electric motor assembly comprising: a drilling string comprising an inner pipe and an outer pipe and an electric motor; wherein the electric motor is provided with power supplied by the inner pipe and the outer pipe acting at least as conductors and associated methods.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: September 5, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Richard Thomas Hay, Keith E. Holtzman
  • Patent number: 9732601
    Abstract: An electrical device for well stimulation comprising a plurality of sections configured to be assembled, end to end, to form a tool. The tool comprises first and second electrodes. The second electrode is an electrically insulated peripheral electrode of the first electrode. The first and second electrodes of the tool forming, at one of the ends of the tool, a stimulation head. Additionally, one end of a body of a first section comprises a peripheral ring that is rotatably movable and translatably immobile relative to the body of the first section. The peripheral ring comprises a thread configured to engage with a thread of the second electrode of one end of a second section.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: August 15, 2017
    Assignee: ENE29 S.AR.L.
    Inventors: Michael Delchambre, Laurent Feriol, Nicolas Innocenti, Jesus Minakata, Salvador Moncho
  • Patent number: 9708866
    Abstract: The present invention relates to a downhole driving unit (11) for insertion into a well, comprising a driving unit housing (51), a hydraulic motor comprising a hydraulic motor housing (93), the hydraulic motor comprising a cam ring (24), a wheel assembly (90) comprising a stationary part (91) and a rotational part, the stationary part (92) being connected with the driving unit housing and a rotatably connected with a rotational part, the stationary part and the rotational part constituting the hydraulic motor housing, said hydraulic motor comprising a rotatable section (84) connected with the rotational part, the cam ring being connected with or forming part of the stationary part of the wheel assembly, the rotational part comprising a wheel ring (99), where in a bearing (36) is arranged between the cam ring and the wheel ring. The present invention also relates to a downhole system comprising the driving unit and to use of such driving unit.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: July 18, 2017
    Assignee: Welltec A/S
    Inventor: Jørgen Hallundbæk
  • Patent number: 9638020
    Abstract: A method and system for steering a rotary steerable tool in a borehole. A method includes determining an azimuthal angle between a reference direction and a reference point on a direction determination component of a tool string. The direction control component is remote from the rotary steerable tool. The azimuthal angle and a time at which the angle was determined are communicated to a rotary steerable tool direction control system. A steerable shaft of the rotary steerable tool is deflected based on the azimuthal angle and the time at which the angle was determined, thereby directing the rotary steerable tool in a predetermined direction.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: May 2, 2017
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Richard T. Hay
  • Patent number: 9631431
    Abstract: A WD sidewall coring tool includes: an outer cylinder set (34); a retrieving mechanism (35); a drilling sealer mechanism (36); a power mechanism (37); and a coring mechanism (38); wherein the outer cylinder set (34) includes a stabilizer (1), a limiting connector (22), and a turning connector (23) connected in sequence; wherein the retrieving mechanism (35) includes a retrieving cylinder (39), a retrieving head set (40), and a steel rope (33); wherein the drilling sealer mechanism (36) includes a connecting rod (28), a universal joint (24), a plug sleeve (29), and a sealing plug (30); wherein the power mechanism (37) includes a flat thrust bearing (17), a screw stator (18), a screw rotor (19), a limiting piston (20), and a first spring (21); wherein the coring mechanism (38) includes a coring cylinder (25), a core grabber (26), and a coring bit (27).
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: April 25, 2017
    Assignee: DRILLING & PRODUCTION ENGINEERING TECHNOLOGY RESEARCH INSTITUTE OF CNPC CHUANGQING DRILLING EXPLORATION COMPANY
    Inventors: Li Chen, Xiaobin Chen, Pan Hu, Juan Lv
  • Patent number: 9580973
    Abstract: The present invention relates to a drill-pipe communication assembly. The drill-pipe communication assembly includes a first drill pipe and an insulated tube disposed within, and generally concentric with, the first drill pipe. A male insert is disposed within a first end of the first drill pipe and a female insert is disposed within a second end of the first drill pipe. A conductor is electrically coupled to the male insert and the female insert. The conductor extends along a length of the first drill pipe. The conductor facilitates transmission of electrical signals from the first end of the first drill pipe to the second end of the first drill pipe.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: February 28, 2017
    Assignee: REI, Inc.
    Inventors: Randall Johnson, Michael J. Hardin, Randy Richardson, Daniel J. Brunner
  • Patent number: 9574407
    Abstract: A drill bit assembly that includes a shank including a shank axis, first and second ends, a drill bit seat at the second end and a central flow bore extending axially from the first end. Additionally, the assembly includes a sleeve disposed about and translatable axially relative to the shank and a drill bit rotatably coupled to the sleeve. The drill bit includes a first bit face having a first cutting structure configured to engage an earthen formation, and a second bit face having a second cutting structure configured to engage the earthen formation. The drill bit is configured to rotate about the about the shank axis in a cutting direction, and to rotate about an axis of rotation being orthogonal to the shank axis to selectively expose the first or second cutting surface to the earthen formation. The seat is configured to receive the first or second bit face.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: February 21, 2017
    Assignee: NATIONAL OILWELL DHT, L.P.
    Inventors: Kevin W. Clark, Chinedu I. Nduka
  • Patent number: 9371698
    Abstract: The present invention is a subsurface formation cutter for directional cutting into a subterranean formation. The subsurface formation cutter includes a transmission unit, a cutter bit, a bit brace, and a ram unit. The transmission unit has a driver shaft operatively connected to a bottom hole assembly. The cutter bit has a connector member, a cutter body rotatably coupled to the connector member, and a bit shaft connected to the cutter body. The bit shaft is operatively coupled to the driver shaft of the transmission unit. The ram unit has a moveable ram shaft connected to a traveling member. The bit brace is pivotably connected to the connector member and the traveling member. A connection member is attaches the ram unit to the transmission unit, and is configured to receive and guide the traveling member to travel in a direction parallel with a longitudinal axis of the subsurface formation cutter.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: June 21, 2016
    Inventor: Bernard Compton Chung
  • Publication number: 20150090499
    Abstract: The mining vehicle has a carriage, driving equipment for moving the carriage, at least one mining work device, an electric motor for supplying power to the mining work device, a connection for supplying electric power to the electric motor from an electrical network of the mine, and an energy source. The electric motor has at least a primary stator winding and a secondary stator winding galvanically isolated from each other. When the mining vehicle is connected to the electrical network of the mine via the primary stator winding, the electric motor is arranged, at least for a period of time, to supply power to the at least one mining work device and, at least for a period of the time, to supply power via the secondary stator winding for charging the energy source. A method for energy supply of a mining vehicle is also provided.
    Type: Application
    Filed: October 1, 2014
    Publication date: April 2, 2015
    Inventors: Mikko KOUVO, Samuli KOUHIA
  • Patent number: 8960331
    Abstract: A bottom hole assembly for a drill string has a mud motor and a mandrel. The motor has a rotor and a stator, and the rotor defines a bore for passage of conductors. The mandrel has a bore for passage of the conductors and for drilling fluid, and rotation of the mandrel rotates a drill bit. A shaft and universal joints covert orbital motion at the rotor to rotational motion at the mandrel. To pass the conductors from a sonde uphole of the motor to electronics disposed with the mandrel, an inner beam disposes in a bore of the shaft. This inner beam has an internal passage for the conductors, and seal caps dispose on each end of the inner beam to seal inside the universal joints. The inner beam and seal caps prevent drilling fluid passing from the motor and around the shaft from communicating in the shaft's bore.
    Type: Grant
    Filed: March 3, 2012
    Date of Patent: February 24, 2015
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Neal S. Yambao, Dan A. Marson
  • Publication number: 20150021094
    Abstract: A method for forming a subsurface wellbore is disclosed. The method includes operating a drilling string in a first direction of rotation. A first motor located near the end of the drilling string is operated in a direction of rotation opposite that of the drilling string. A drill bit is rotated using a second motor that is coupled to the first motor.
    Type: Application
    Filed: June 16, 2014
    Publication date: January 22, 2015
    Inventor: Duncan Charles MacDonald
  • Publication number: 20140326509
    Abstract: A pipe in pipe electric motor assembly comprising: a drilling string comprising an inner pipe and an outer pipe and an electric motor; wherein the electric motor is provided with power supplied by the inner pipe and the outer pipe acting at least as conductors and associated methods.
    Type: Application
    Filed: January 11, 2012
    Publication date: November 6, 2014
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Richard Thomas Hay, Keith E. Holtzman
  • Publication number: 20140311804
    Abstract: The present disclosure relates to a power isolation adapter which can enable the use of multiple power sources in a bottom hole assembly (BHA) by isolating the power sources on a tool bus while maintaining a communication bus across the BHA. Such power sources may be part of a measurement-while-drilling (MWD) module, such as a mud turbine generator, providing power as a DC signal. The power isolation adapter isolates the power sources by blocking DC signals, but maintains an AC communication bus across the BHA. The ability to use multiple power sources in a BHA thus allows for more complex BHA configurations that normally could not be powered using a single power source.
    Type: Application
    Filed: April 16, 2014
    Publication date: October 23, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Raphael Gadot, Randall Leblanc, Jason Gardner
  • Publication number: 20140311806
    Abstract: A rotating control device for sealing about a drill pipe can include a seal which can sealingly engage the drill pipe, and a generator which generates electricity in response to rotation of the drill pipe while the seal sealingly engages the drill pipe. A method of generating electricity from rotation of a drill pipe can include sealingly engaging the drill pipe with a seal of a rotating control device, and generating electricity in response to the rotation of the drill pipe. A system for generating electricity can include a rotating control device which seals about a drill pipe while the drill pipe rotates, the rotating control device comprising a seal and a generator which generates electricity in response to rotation of the drill pipe.
    Type: Application
    Filed: September 26, 2012
    Publication date: October 23, 2014
    Inventors: Carlos G. Bruder, Walter K. Olszewski
  • Patent number: 8763683
    Abstract: A control circuit for a coiled tubing injector includes a circuit controller (14). One or more counterbalance vales (3) may be responsive to the circuit controller to prevent the tubing string from descending into the wellbore during rate of penetration movement. In one embodiment, a control valve (4) allows fluid to flow through a bypass line around the counterbalance valves when drilling in a weight-on-bit mode. Other hydraulic control circuits allow for the release of fluid pressure to control the injector hydraulic motor. In yet another embodiment, the control circuit regulates power to an electric motor of the injector.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: July 1, 2014
    Assignee: Xtreme Drilling and Coil Services Corp.
    Inventor: Richard Havinga
  • Patent number: 8746365
    Abstract: Shock waves produced during electro-hydraulic drilling can be reflected into a rock body where the reflected shock waves are converted from compression waves to tension waves, which are more efficient at breaking down the rock body. A system configured for electro-hydraulic drilling where shock waves produced during drilling are reflected into the rock body includes two electrodes and a shock wave reflector disposed at an electro-hydraulic drill head. The two electrodes are configured to (1) facilitate formation of a spark along a spark path spanning the two electrodes and (2) facilitate a pulse of electricity being passed through the spark to form a primary shock wave emanating from the spark path. The shock wave reflector is configured to reflect a portion of the primary shock wave such that the reflected shock wave is concentrated to a focal region within the rock body.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: June 10, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventor: Alexander F. Gutsol
  • Publication number: 20140027176
    Abstract: In one aspect, a drill bit is disclosed that in one embodiment includes a pad configured to extend and retract from a surface of the drill bit, and a force application device configured to extend and retract the pad, wherein the force application device includes a screw driven by an electric motor that linearly moves a drive unit to extend and retract the pad from the drill bit surface. In another aspect, a method of drilling a wellbore is provided that in one embodiment includes: conveying a drill string having a drill bit at an end thereof, wherein the drill bit includes a pad configured to extend and retract from a surface of the drill bit and a force application device configured to extend and retract the pad, wherein the force application device includes a screw driven by an electric motor that moves a drive unit to extend the pad from the drill bit face; and rotating the drill bit to drill the wellbore.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 30, 2014
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Thorsten Schwefe, Dan Raz, Gregory Rinberg
  • Patent number: 8616304
    Abstract: Various embodiments relate to bearing assemblies configured to enable removal and replacement of superhard bearing elements, and bearing apparatuses that may utilize such bearing assemblies. The disclosed bearing assemblies may be used in a number of applications, such as downhole motors in subterranean drilling systems, directional drilling systems, roller-cone drill bits, and many other applications. In an embodiment, a bearing assembly includes a support ring and a retention ring assembled with the support ring. The bearing assembly further includes a plurality of superhard bearing elements. The retention ring and at least a number of the superhard bearing element are collectively configured to restrict displacement of the at least a number of the superhard bearing elements.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: December 31, 2013
    Assignee: US Synthetic Corporation
    Inventors: Shawn C. Scott, Jeffrey A. Johns, Timothy N. Sexton, Craig H. Cooley
  • Publication number: 20130333947
    Abstract: A motor includes: a rotor including an undulated surface; a rod disposed about the rotor; and a coil disposed about the rod to induce shape changes in the rod, which in turn impart forces to the undulated surface to rotate the rotor.
    Type: Application
    Filed: March 7, 2012
    Publication date: December 19, 2013
    Inventor: Richard Thomas Hay
  • Publication number: 20130313022
    Abstract: Rotational locking mechanisms for drill string assemblies, bottom hole assemblies, and drilling motors are presented herein. A fluid-driven motor assembly is disclosed for use in a drill string to drill a borehole in an earth formation. The drill string includes a drill pipe and a drill bit. The motor assembly includes a housing that is configured to operatively connect to the drill pipe of the drill string to receive drilling fluid therefrom. A stator, which is disposed within the housing, is configured to rotate at a stator speed. A rotor is disposed within the stator and coupled to the drill bit. The rotor is configured to rotate at a rotor speed. The motor assembly also includes a rotational locking assembly operatively coupled to the rotor and the housing. The rotational locking assembly is configured to prevent the stator speed of the stator from exceeding the rotor speed of the rotor.
    Type: Application
    Filed: March 14, 2013
    Publication date: November 28, 2013
    Applicant: Halliburton Energy Services Inc.
    Inventors: Kennedy J. Kirkhope, Alben D'Silva
  • Publication number: 20130228373
    Abstract: An apparatus for use in a wellbore is provided that in one embodiment includes a load, a motor coupled to the load to provide electrical power to the load and an alternator directly coupled to the motor driving the motor. In one aspect, the apparatus further includes a switch between the alternator and the motor that in a first position connects the alternator to the motor in a first configuration that rotates the motor in the clockwise direction and in a second configuration that rotates the motor in the counterclockwise direction.
    Type: Application
    Filed: March 1, 2012
    Publication date: September 5, 2013
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Eckard Scholz
  • Patent number: 8496075
    Abstract: Various embodiments relate to bearing assemblies configured to enable removal and replacement of superhard bearing elements, and bearing apparatuses that may utilize such bearing assemblies. The disclosed bearing assemblies may be used in a number of applications, such as downhole motors in subterranean drilling systems, directional drilling systems, roller-cone drill bits, and many other applications. In an embodiment, a bearing assembly includes a support ring and a retention ring assembled with the support ring. The retention ring includes a plurality of through holes. The bearing assembly further includes a plurality of superhard bearing elements, with each superhard bearing element inserted partially through and projecting from a corresponding one of the through holes of the retention ring. The retention ring and each superhard bearing element are collectively configured to restrict displacement of each superhard bearing element beyond a selected position in a direction away from the support ring.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: July 30, 2013
    Assignee: US Synthetic Corporation
    Inventors: Shawn C. Scott, Jeffrey A. Johns, Timothy N. Sexton, Craig H. Cooley
  • Publication number: 20130112482
    Abstract: An apparatus and process is disclosed for drilling a borehole into a subterranean formation with reverse circulation of drilling fluid. A tubular drill pipe extends into a subterranean formation. A bottom hole assembly connected to the drill pipe includes a drill bit for excavating the subterranean formation. A downhole motor is adapted for receiving electrical power from a cable extending into the subterranean formation. A downhole pump is powered by the motor and is configured for reverse circulating drilling fluid from the annular space surrounding the drill pipe to the interior space of the drill pipe. The drilling fluid is pumped upwards in the drill pipe by the downhole pump to carry excavated cuttings upwards through the interior space of the drill pipe.
    Type: Application
    Filed: November 6, 2012
    Publication date: May 9, 2013
    Applicant: Chevron U.S.A. Inc.
    Inventors: George Taylor Armistead, Henry Anthony Bergeron
  • Publication number: 20130112401
    Abstract: Procedures and devices are described for electric energy generation from electrochemical use of substances for powering downhole devices. According to some other embodiments procedures and devices are described for electric energy generation from nuclear decay for powering downhole devices. According to some embodiments, the types of devices being powered are untethered or otherwise cannot benefit from direct power transmission from the surface. Examples of devices include small devices in downhole environments. Other examples of devices are sensors and other hardware such as flow control valves installed during completion. According to one example permanent and/or semi-permanent monitoring sensors make use of the energy generation techniques described herein.
    Type: Application
    Filed: November 7, 2011
    Publication date: May 9, 2013
    Inventors: Julio C. Guerrero, Jeffrey Lang
  • Publication number: 20130092444
    Abstract: The present invention discloses a cutting tool integrated in a drillstring for enlarging a borehole, where the cutting tool at least comprises: one or more side mills (12, 13, 14) arranged along the axis of said drillstring in a reamer housing (11), where the side mills (12, 13,14) are adapted to be rotated relative to the tool housing (11) by individual driving means. The self driven rotational side mills may be dome shaped cones where expand radially out of the reamer housing (11), or may be a special non-circular dome shaped cones where rotates without expanding.
    Type: Application
    Filed: August 12, 2011
    Publication date: April 18, 2013
    Inventor: Mohammad Ali Taghipour Khadrbeik
  • Publication number: 20130087386
    Abstract: An expandable reamer apparatus and methods for reaming a borehole, wherein a laterally movable blade carried by a tubular body may be selectively positioned at an inward position and an expanded position. The laterally movable blade, held inwardly by blade-biasing elements, may be forced outwardly by drilling fluid selectively allowed to communicate therewith by way of an actuation sleeve disposed within the tubular body. Alternatively, a separation element may transmit force or pressure from the drilling fluid to the movable blade. Further, a chamber in communication with the movable blade may be pressurized by way of a downhole turbine or pump. A ridged seal wiper, compensator, movable bearing pad, fixed bearing pad preceding the movable blade, or adjustable spacer element to alter expanded blade position may be included within the expandable reamer. In addition, a drilling fluid pressure response indicating an operational characteristic of the expandable reamer may be generated.
    Type: Application
    Filed: July 9, 2012
    Publication date: April 11, 2013
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Steven R. Radford, Kelly D. Ireland, Anurag Gautam, Robert A. Laing, Matthew D. Mumma, Daryl L. Pritchard
  • Patent number: 8327952
    Abstract: A self-contained system for drilling a drainhole laterally to a wellbore that includes a drill head with a tool for boring a drainhole and a self-propelled device for advancing the head into the drainhole during boring; a relay unit lowered into the wellbore, arranged to position the drill head against the sidewall of the wellbore in order to initiate the boring of the drainhole laterally to the wellbore; a cable for supplying electric power to the drill head, reeled out from the relay unit; and a mechanical system for removing cuttings from the drainhole during boring, the debris removed falling downhole.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: December 11, 2012
    Assignee: Total SA
    Inventors: Christophe Amadei, Emmanuel Derbez
  • Patent number: 8230948
    Abstract: A self-contained system for drilling a drainhole laterally to a wellbore that includes a drill head with a tool for boring a drainhole and a self-propelled device for advancing the head into the drainhole during boring; a relay unit lowered into the wellbore, arranged to position the drill head against the sidewall of the wellbore in order to initiate the boring of the drainhole laterally to the wellbore; a cable for supplying electric power to the drill head, reeled out from the relay unit; and a mechanical system for removing cuttings from the drainhole during boring, the debris removed falling downhole.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: July 31, 2012
    Assignee: Total SA
    Inventors: Christophe Amadei, Emmanuel Derbez
  • Patent number: 8151902
    Abstract: A bottom hole assembly is run into the wellbore on slickline with a tractor to assist in movement of the bottom hole assembly through a deviation in either direction. The tractor can have retractable drive components and can be responsive to tension in the slickline to turn it on and to avoid overrunning the slickline if driving out.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: April 10, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Gerald D. Lynde, Graeme J. Walker
  • Publication number: 20110303461
    Abstract: A downhole tool string, comprising a tool string bore and a drill bit located at the bottom of the tool string. The drill bit comprises a body intermediate a shank and a working surface. The working surface may comprise a substantially coaxial rotationally isolated jack element with a portion of the jack element extending out of an opening formed in the working surface to engage a subterranean formation. The tool string may comprise a driving mechanism adapted to rotate the jack. The clutch assembly disposed within the tool string bore may comprise a first end in communication with the jack element and second end in communication with the driving mechanism.
    Type: Application
    Filed: January 11, 2011
    Publication date: December 15, 2011
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: David R. HALL, David LUNDGREEN
  • Patent number: 8069933
    Abstract: Various embodiments of the present invention relate to bearing assemblies configured to accommodate non-uniform loading and misalignment with an adjacent bearing assembly. In one embodiment of the present invention, a bearing assembly for use in a subterranean drilling system is disclosed. The bearing assembly includes a support ring and a retention ring attached to the support ring, with the retention ring including a plurality of through holes. The bearing assembly includes a plurality of bearing elements each of which includes a superhard bearing surface. Each of the bearing elements is positioned in and extends from a corresponding through hole of the plurality of through holes. At least a number of the bearing elements are configured to restrict displacement through the corresponding through hole and away from the support ring.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: December 6, 2011
    Assignee: US Synthetic Corporation
    Inventors: Timothy N. Sexton, Craig H. Cooley
  • Patent number: 8028766
    Abstract: An electrically powered and controlled tractor system includes one or more electric gripper assemblies and one or more electric power train assemblies. Power and control signals for the gripper assemblies and power train assemblies can be delivered from a ground surface via a wireline. The gripper assembly employs a motor-activated lead screw and nut combination to expand passage-gripping elements, preferably by pushing the gripping elements radially outward from locations between opposing ends of the gripping elements. A failsafe mechanism can retract the gripping elements during a power interruption. The power train assembly employs a motor-activated lead screw and nut combination to expand and contract two or more telescoping members. The tractor system can include multiple tractor units that each includes one gripper assembly and one power train assembly. A tractor can include one power train assembly and two gripper assemblies.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: October 4, 2011
    Assignee: WWT International, Inc.
    Inventor: Norman Bruce Moore
  • Patent number: 7984769
    Abstract: A method for the directional control of a rock-drilling ma-chine, the drilling unit (1) of the rock-drilling machine, which is located in a borehole (2), comprising at least a pi-lot drill bit (6) or an underreamer drill bit (8), the drill bit(s) (6, 8) being driven by an electric motor (10) via a gearbox (12), and the drill bit(s) (6, 8) being moved into the rock (3) by means of a feeding rod (4) extending from a feeding machine at the outside the borehole (2), and the drill bit(s) (6, 8), gearbox (12) and motor (10) being pivoted in a controlled manner about a steering axis (18) which is approximately perpendicular to the center axis (26) of the feeding rod (4).
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: July 26, 2011
    Assignee: Norwegian Hard Rock Drilling AS
    Inventors: Sigurd Kjell Haughom, Kjeli Knutsen
  • Patent number: 7980331
    Abstract: A drill string component includes a downhole power assembly and a center mandrel with a through-bore adapted to accommodate a flow of drilling fluid. The downhole power assembly includes a tubular battery cage disposed around the center mandrel. At least one battery is disposed in at least one bay formed in the tubular battery cage and a tubular sleeve is adapted to slide over and cover the tubular battery cage.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: July 19, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Paula Turner, Nathan Nelson
  • Publication number: 20110168447
    Abstract: A reaming tool for use in reaming a bore includes a body adapted for location in a bore. The body defines a rotor of a rotary drive arrangement. A shaft adapted for location is disposed in the body. The shaft defines a stator of the rotary drive arrangement. A seal element is disposed between the shaft and the body. The seal element defines a bearing surface for permitting sealed relative rotation of the rotary drive arrangement. The tool includes a reaming member, wherein relative rotation between the body and the shaft facilitates reaming of the bore by the reaming member.
    Type: Application
    Filed: December 24, 2010
    Publication date: July 14, 2011
    Inventors: Edward D. Scott, Lance S. Davis
  • Publication number: 20110100640
    Abstract: A drive mechanism is described for moving/controlling objects/mechanisms/systems coupled with a drillstring and/or pipe. The drive mechanism may be axially arranged on a drillstring or pipe, compact, capable of fine control and delivering high torque or the like and may be electrically and/or hydraulically powered. The drive mechanism may comprising a driving member comprising a plurality of drivers linearly translatable with respect to the driving member, each driving member having at their ends a male engaging portion and an associated driven member, comprising a plurality of female receiving portions adapted to receive a male engaging portion, the arrangement being such that linear translation of a driver causes its engaging portion to engage with a female receiving portion and the action of the engaging portion produces a reaction in the receiving portion causing displacement of the driven member in a direction other than that of the translatable driver.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 5, 2011
    Applicant: Schlumberger Technology Corporation
    Inventor: William Bertram
  • Patent number: 7870913
    Abstract: Various aspects of the present invention relate to bearing assemblies configured to accommodate non-uniform loading and misalignment with an adjacent bearing assembly. In one aspect of the present invention, a bearing assembly is disclosed. The bearing assembly comprises a compliance ring including a plurality of beams. Each of the beams is circumferentially spaced apart from each other. The bearing assembly further comprises a plurality of bearing elements, with each of the bearing elements positioned adjacent to a corresponding beam of the plurality of beams. Each of the bearing elements deforms one of the corresponding beams when loaded. An additional aspect of the present invention is directed to a bearing assembly in which bearing elements thereof may be mounted to a support element without using a brazing process.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: January 18, 2011
    Assignee: US Synthetic Corporation
    Inventors: Timothy N. Sexton, Craig H. Cooley
  • Patent number: 7866416
    Abstract: A downhole tool string, comprising a tool string bore and a drill bit located at the bottom of the tool string. The drill bit comprises a body intermediate a shank and a working surface. The working surface may comprise a substantially coaxial rotationally isolated jack element with a portion of the jack element extending out of an opening formed in the working surface to engage a subterranean formation. The tool string may comprise a driving mechanism adapted to rotate the jack. The clutch assembly disposed within the tool string bore may comprise a first end in communication with the jack element and second end in communication with the driving mechanism.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: January 11, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, David Lundgreen
  • Patent number: 7770667
    Abstract: An electrically powered and controlled tractor system includes one or more electric gripper assemblies and one or more electric power train assemblies. Power and control signals for the gripper assemblies and power train assemblies can be delivered from a ground surface via a wireline. The gripper assembly employs a motor-activated lead screw and nut combination to expand passage-gripping elements, preferably by pushing the gripping elements radially outward from locations between opposing ends of the gripping elements. A failsafe mechanism can retract the gripping elements during a power interruption. The power train assembly employs a motor-activated lead screw and nut combination to expand and contract two ore more telescoping members. The tractor system can include multiple tractor units that each includes one gripper assembly and one power train assembly. A tractor can include one power train assembly and two gripper assemblies.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: August 10, 2010
    Assignee: WWT International, Inc.
    Inventor: Norman Bruce Moore
  • Patent number: 7755235
    Abstract: A downhole generator comprises a turbine coaxially disposed inside a section of drillstring and that will be spun when hydraulic or pneumatic flows are pushed through to a drillbit motor on a distal end. The turbine, in turn, spins permanent magnets in an orbit around the outside of a cylindrical containment shell. Such containment shell is made of titanium or aluminum and will allow the spinning magnets fields to enter and induce electrical currents in coils within. Current from the coils is rectified and filtered to provide a DC operating voltage through intrinsically safe connectors to various loads including drillstring steering controls, radars, and telemetry circuits. The hydraulic and pneumatic flows stream past all around the cylindrical containment shell from the turbine on their way to the drillbit motor.
    Type: Grant
    Filed: March 22, 2008
    Date of Patent: July 13, 2010
    Assignee: Stolar, Inc.
    Inventor: Richard Brewster Main
  • Patent number: 7687950
    Abstract: A downhole source of electrical power for drilling tools is driven by the rotation of a drillstring or, if the drillstring is not rotating, by the rotation of a drilling sub. The source consists of an alternator having a rotor made up of a series of coils that are mounted on, and spaced around the circumference of, a rotating drilling sub, and a stator made up of a multiplicity of permanent magnets also spaced around the circumference of the drilling sub. The stator is mounted on the drilling sub by means of bearings and incorporates a counterweight that holds the rotor relatively stationary with respect to the sub and with respect to the coils, so that rotation of the sub, either by rotation of the drillstring or by rotation of a drill motor in the drilling sub, produces relative rotation of the rotor and stator to generate an AC electrical output.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: March 30, 2010
    Assignee: Vector Magnetics LLC
    Inventor: Arthur F. Kuckes
  • Publication number: 20100039074
    Abstract: An alternator an electronic voltage pre-regulation circuit adapted for incorporation into a drill string is provided and includes: a plurality of n-phase generators for providing alternating current (AC), wherein the AC of each generator is rectified to a direct current (DC) voltage using a respective rectifier to provide a DC power supply, and each DC power supply is arranged in series for being one of connected and disconnected from an output of the alternator. A method and a drill string are provided.
    Type: Application
    Filed: August 15, 2008
    Publication date: February 18, 2010
    Applicant: Baker Hughes Incorporated
    Inventors: Helge Brand, Eckard Scholz
  • Publication number: 20100018775
    Abstract: Drilling tool (1) for drilling a well downhole where fluid is surrounding the tool and where the tool has a housing (15) and is connected to an electrical conducting means, such as a wireline. The drilling tool has a drilling head (2) and a fluid cleaner (3) for removal of elements, such as debris and formation pieces, from the fluid while drilling downhole. The fluid cleaner has a chamber (4) and a filter (5) within the chamber for separation of the elements from the fluid. The tool further comprises a pump (8) for pumping the fluid into the chamber through an inlet (11) in the drilling head (2) and through the filter before entering the well again. Furthermore, the tool comprises a driving unit for driving the pump and the drilling head.
    Type: Application
    Filed: February 28, 2008
    Publication date: January 28, 2010
    Inventors: Jorgen Hallundbaek, Thomas Sune Andersen
  • Publication number: 20100000793
    Abstract: A generator (10) is provided for positioning downhole in a drill string (12) to generate power powering one or more downhole tools (16, 18). The generator includes a progressive cavity housing (28) and a progressive cavity rotor (13) which rotates in response to fluid passing through the progressive cavity housing. A restriction (36) in the annulus downstream from the ports controls the fluid flow in the annulus and past the restriction, and thereby the fluid flow through the progressive cavity housing. The generator may provide either hydraulic or electrical power, or both, powering the one or more tools.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 7, 2010
    Inventor: Billy W. White
  • Patent number: 7607495
    Abstract: 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, a two-position gripper control valve, two cycle valves, and two pressure reduction valves. The inlet control valve spool includes a hydraulically controlled deactivation cam that locks the valve in a closed position, rendering the tractor non-operational. The propulsion control valve is piloted on both ends by fluid pressure in the gripper assemblies. The propulsion control valve controls the distribution of operating fluid to and from the propulsion cylinders, such that one cylinder performs a power stroke while the other cylinder performs a reset stroke. Each end of the gripper control valve is piloted by a source of high-pressure fluid selectively admitted by one of the cycle valves.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: October 27, 2009
    Assignee: Western Well Tool, Inc.
    Inventors: Duane Bloom, Norman Bruce Moore, Robert Levay
  • Publication number: 20090236149
    Abstract: A downhole generator comprises a turbine coaxially disposed inside a section of drillstring and that will be spun when hydraulic or pneumatic flows are pushed through to a drillbit motor on a distal end. The turbine, in turn, spins permanent magnets in an orbit around the outside of a cylindrical containment shell. Such containment shell is made of titanium or aluminum and will allow the spinning magnets fields to enter and induce electrical currents in coils within. Current from the coils is rectified and filtered to provide a DC operating voltage through intrinsically safe connectors to various loads including drillstring steering controls, radars, and telemetry circuits. The hydraulic and pneumatic flows stream past all around the cylindrical containment shell from the turbine on their way to the drillbit motor.
    Type: Application
    Filed: March 22, 2008
    Publication date: September 24, 2009
    Inventor: Richard Brewster Main
  • Publication number: 20090200078
    Abstract: A drilling system for use in a well bore consists of a drill string, an electrically powerable pump (8), a connector (16) for supporting the pump (8) including a through bore (32) through which fluid can flow, and a power cable (15) to provide power to the electrically powerable pump. The cuttings are pumped up through the drillpipe (3). The drill bit (4) may also be powered by the pump. Part of the cable is disposed externally to the drill string where new pipe sections are added, before passing into the drill string through a cross-over means (40) further down the drillpipe to connect to the electrically powerable pump.
    Type: Application
    Filed: August 15, 2005
    Publication date: August 13, 2009
    Inventor: Philip Head
  • Publication number: 20090159281
    Abstract: A method of running a tubular string into a wellbore comprises running a bore-lining tubular string into a wellbore substantially without rotation, while rotating a cutting structure at a distal leading end of the tubular string. Other methods provide for rotation of the string and the provision of a non-rotating stabiliser towards the leading end of the string.
    Type: Application
    Filed: June 26, 2008
    Publication date: June 25, 2009
    Inventor: Derek F. Herrera