With Mechanical Motion-converting Means Patents (Class 175/106)
  • Patent number: 9376865
    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: Grant
    Filed: March 14, 2013
    Date of Patent: June 28, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Kennedy J. Kirkhope, Alben D'Silva
  • Patent number: 9085941
    Abstract: A piston assembly may comprise a housing with a wall, and at least one chamber formed in the wall. A piston may be disposed within the chamber and at least one passageway may pass through the piston. At least one pin may be disposed within the passageway and attached to the chamber, and the piston may be free to translate relative to the pin.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: July 21, 2015
    Inventors: David R. Hall, Jonathan Marshall
  • Patent number: 9068399
    Abstract: A down-hole hammer includes a two-piece drill bit retained in a casing having an interior surface with a plurality of longitudinal grooves formed therein. The bit shank and the casing are rotationally connected by a number of pins received in the grooves. A symmetrical free piston divides the casing into an upper working chamber and a lower working chamber. The piston slides on an air control assembly including a ported tube extending axially from said air supply to an axial bore in the shank of the bit to guide exhaust air through discharge ports at the cutting face of the bit, the bit reciprocating on the end of the tube. The upper and lower check valves in the air control assembly and openable by supply pressure against a spring bias in response to working fluid supply pressure.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: June 30, 2015
    Assignee: Drillroc Pneumatic Pty Ltd
    Inventor: Tony Lorger
  • Publication number: 20150108767
    Abstract: A disclosed example embodiment of a constant velocity device positionable in a well bore includes a continuously-variable transmission, including an input race coupled to a rotational power input shaft, an output race, and a plurality of transmission elements disposed between the input race and the output race in a planetary formation. The transmission elements are configured to transmit rotational power from the input race to the output race. The constant velocity device also includes a weighted rotor assembly coupled at a first end to the output race. The weighted rotor assembly includes at least two weighted lever arms rotatable about a central axis of a power output shaft coupled to a second end of the weighted lever arms.
    Type: Application
    Filed: September 17, 2013
    Publication date: April 23, 2015
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Daniel Martin Winslow
  • Publication number: 20150083496
    Abstract: The subject matter of this specification can be embodied in, among other things, a tool string positionable in a wellbore that includes a spur gear driven by a source of input rotation, a planetary gearbox having an attachment structure to connect to the spur gear. The gearbox includes a central sun gear, a collection of planet gears disposed in a planet gear carrier disposed around the central sun gear, and a ring gear disposed around the planet gears and planet gear carrier. The attachment structure drives a hydraulic pump or electrical generator at a rotational speed different than a rotational speed of the source of input rotation.
    Type: Application
    Filed: May 10, 2013
    Publication date: March 26, 2015
    Inventor: Daniel Martin Winslow
  • Publication number: 20150075871
    Abstract: Drill string assemblies, bottom hole assemblies (BHAs), and powertrains for a BHA in a drill string are presented herein. A BHA for use in a drill string to drill boreholes in an earth formation is disclosed. The BHA includes a housing, a drill bit rotatably coupled to the housing, and a fluidly driven motor assembly, such as a positive displacement motor (PDM). The PDM assembly includes a drive shaft to output rotational drive forces generated by the PDM. Also included is a differential gear set with a first gear member coupled to the drive shaft, a second gear member intermeshing the first gear member with the housing, and a third gear member couple to the drill bit. The differential gear set transmits the rotational drive forces from the drive shaft to the drill bit and rotates the drill bit at a speed greater than the speed of the PDM assembly.
    Type: Application
    Filed: April 19, 2012
    Publication date: March 19, 2015
    Applicant: HALLIBURTON ENERGY SERVICES INC.
    Inventor: Andrew Jerome Strittmatter
  • Patent number: 8950503
    Abstract: A control system for use in a subterranean well comprises at least one power generation device positioned within the subterranean well, the at least one power generation device adapted to supply electrical power to at least one apparatus positioned within the subterranean well and at least one control line positioned in the subterranean well. The at least one control line connects each power generation device to surface and is adapted to supply a hydraulic pressure applied from surface to the at least one power generation device from which the at least one power generation device generates the electrical power to be supplied to the at least one apparatus.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: February 10, 2015
    Assignee: Petrowell Limited
    Inventor: Daniel Purkis
  • Patent number: 8925649
    Abstract: A system to harvest mechanical energy in a wellbore, wherein the mechanical energy comes from motion. The system uses mechanical energy coming from at least one of: motion of a drill bit, motion of a drill string, motion of flowing air or drilling mud down the drill string to the drill bit and up an annulus between the drill string and the wellbore, motion of a bottom hole assembly connected to the drill string. The system can include a plurality of piezoelectric stand bundles, wherein each individual piezoelectric strand can vibrate as the pressure housing moves in the wellbore, thereby producing electricity.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: January 6, 2015
    Assignee: Focus Tools Colorado, LLC
    Inventors: Darcy L. Wiebe, Rene M. Rey
  • Patent number: 8919457
    Abstract: An apparatus for determining the weight on a drill bit and axial forces along a drill string drilling though an earthen formation. The apparatus comprising an LVDT incorporated into a torsional bearing of a magneto-rheological damping system such that the LVDT senses the relative displacement and accelerations between a bearing mandrel portion and a bearing casing portion of the torsional damper. The LVDT is calibrated with respect to a spring in the damping system that resists relative motion between the bearing mandrel and bearing casing such that the output of the LVDT can be transformed into the force associated with the weight on the drill bit, and the same LVDT accelerations combined with the mass distribution along the drill string to determine axial stresses.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: December 30, 2014
    Inventor: Mark Hutchinson
  • Patent number: 8910720
    Abstract: A downhole tool for positioning in a wellbore comprises a tool main body, an electric motor disposed within the tool main body, the motor comprising a rotor rotatably attached to a stator, and a linear actuator assembly disposed within the motor for transforming a rotary output of the motor into a linear displacement.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: December 16, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Franz Aguirre, Wade D. Dupree, Mark Holly, Derek Copold
  • Publication number: 20140318867
    Abstract: A downhole tractor assembly that is configured for open-hole applications and of a self-aligning nature. The self-aligning nature of the assembly is effectuated through a tractor portion which is rotable about an axis of an elongated body of the assembly independent of a separate centralizing portion of the assembly. That is, the tractor portion, configured for interfacing an open-hole well wall of potentially irregular morphology, is independently rotable so as to maintain a position of substantially optimized driving friction at the interface during tractoring. Maintenance of optimized driving friction in this manner may occur irrespective of the orientation of the centralizing portion of the assembly.
    Type: Application
    Filed: July 7, 2014
    Publication date: October 30, 2014
    Inventors: Franz Aguirre, Todor K. Sheiretov, Keith R. Nelson
  • Patent number: 8746369
    Abstract: Exemplary methods, systems and components disclosed herein provide propagation of light signals from an external source to a borehole mining mole which includes an optical/electric transducer configured to provide propulsive power for the borehole mining mole and its associated mineral prospecting tools. Some embodiments include one or more umbilicals connected from a remote source location to an onboard reel incorporated with the borehole mining mole. The umbilicals are spooled outwardly or inwardly from the onboard reel during traverse of the borehole mining mole along a path in an earthen environment.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: June 10, 2014
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, Clarence T. Tegreene, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y. H. Wood
  • Patent number: 8646549
    Abstract: A drilling machine includes a compressor coupled to a prime mover through a hydraulic clutch, wherein the hydraulic clutch is repeatably moveable between engaged and disengaged conditions. The compressor is allowed to provide air and is restricted from providing air in response to the hydraulic clutch being in the engaged and disengaged conditions, respectively. The hydraulic clutch is moveable between the engaged and disengaged conditions during operation of the prime mover.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: February 11, 2014
    Assignee: Atlas Copco Drilling Solutions LLC
    Inventors: Timothy W. Ledbetter, Iain A. Peebles
  • Publication number: 20140027179
    Abstract: A drill bit is disclosed that in one embodiment includes a pad configured to extend and retract from a surface of the drill bit, a motor, a linearly movable member coupled to the motor, a hydraulic unit configured to apply force on the pad, and wherein motion of the motor in a first direction causes the linearly movable member in a first direction to cause the hydraulic unit to exert a force on the pad to extend the pad.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 30, 2014
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Thorsten Schwefe, Dan Raz, Gregory Rinberg, Mark Bruk
  • Patent number: 8602127
    Abstract: A bottom hole assembly has a drill bit that is driven by a downhole turbine. The turbine speed is reduced by cycloidal gearing that requires no temperature sensitive seals when operating temperatures in some applications exceed 350 degrees F. The output shaft of the cycloidal gear reducer goes through a bearing before connection to the drill bit or associated reamer. The motive fluid can be the drilling mud. The bit can be driven at desired speeds such as 50-300 RPM while the speed reduction ratio can be in the order of 10 to 1 or more. This drive assembly can replace Moineau type downhole motor drivers that have temperature limitations due to use of rubber in the stators.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: December 10, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Olof Hummes
  • Patent number: 8561723
    Abstract: Drilling apparatus having a drillstring and operable to rotate the drillstring and operable to provide vibration axially to the drill head. Relies upon vibrational apparatus positioned to provide the vibration reliant upon interactive magnetic arrays, as a consequence of the relative rotation caused by a mechanical input to at least one array or set of arrays of the vibrational apparatus. One of the arrays or sets of arrays moves synchronously, in rotation, with the drillstring when the drillstring is rotated.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: October 22, 2013
    Assignee: Flexidrill Limited
    Inventors: Peter Evan Powell, Gregory Donald West
  • Patent number: 8544560
    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: Grant
    Filed: November 3, 2009
    Date of Patent: October 1, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: William Bertram, Walter Aldred, Ashley Johnson, Frank Espinosa, Michael Barrett, Carlos Delgado
  • Patent number: 8371400
    Abstract: A downhole tool string component has at least one end adapted to connect to an adjacent tool sting component and a bore adapted to accommodate a flow of drilling fluid. A turbine is disposed within the bore and an actuating assembly is arranged such that a clutch may mechanically connect and disconnect with the turbine.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: February 12, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Patent number: 8362915
    Abstract: A system and a method for determining stretch or compression of a drill string is disclosed. Sensors are positioned along the drill string for collecting data for determining the stretch or compression. The stretch or the compression of the drill string may be used to calculate depths at which measurements are obtained by tools associated with the drill string.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: January 29, 2013
    Assignee: Intelliserv, LLC
    Inventors: Shyam Mehta, Georgiy Bordakov
  • Publication number: 20130000987
    Abstract: A steerable ground piercing tool includes an elongated outer housing having a lengthwise extending bore and an inner assembly at least in part disposed within the outer housing. The inner assembly includes a rotatable chisel having a longitudinally extending shaft at least in part disposed within the housing bore. The chisel has a first end defining an asymmetric tip and a second end defining a first impact surface for receiving a reciprocating action impact to drive the tool through the ground. The inner assembly further includes a conversion mechanism to selectively convert upon activation thereof at least a first portion of the reciprocating action imparted to the first impact surface into combined reciprocation and rotation of the tool.
    Type: Application
    Filed: September 4, 2012
    Publication date: January 3, 2013
    Applicant: Louisiana Tech University Research Foundation
    Inventors: Erez N. Allouche, David Hall, Michael Swanbom, Slade Richard
  • Patent number: 8302682
    Abstract: A wireline tractor includes a displacement mechanism and at least one driving wheel positioned on the displacement mechanism so that the driving wheel is held in a biasing manner against a well wall. The displacement mechanism is rotatable or movable between a first position at which the driving wheel bears against the well wall on one side of the wireline tractor, and a second position at which the driving wheel bears against the well wall on the opposite side of the wireline tractor.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 6, 2012
    Assignee: Aker Well Service AS
    Inventor: Gerald McInally
  • Publication number: 20120228031
    Abstract: The invention relates to a ram boring device for creating horizontal boreholes, having an impact piston which moves in an oscillatory manner within a casing of the ram boring device and of which the impact frequency or impact intensity can be varied by displacing the center position of the impact piston inside the casing.
    Type: Application
    Filed: August 20, 2010
    Publication date: September 13, 2012
    Applicant: TRACTO-TECHNIK GmbH & Co. KG
    Inventor: Franz-Josef PĆ¼ttmann
  • 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: 20110240369
    Abstract: In one aspect of the present invention, a drill bit has an axis of rotation and drill bit body intermediate a threaded end and a working face. The drill bit body houses a jack element protruding from the drill bit body and the jack element has a plurality of inserts disposed on the indenting end.
    Type: Application
    Filed: April 1, 2010
    Publication date: October 6, 2011
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Patent number: 8025110
    Abstract: A down hole drilling motor shaft security apparatus is disclosed. The apparatus has a general body housing threadedly attached to a lower radial bearing housing and an output shaft extending from the lower radial bearing housing. Within the general body housing is a thrust bearing assembly that secures a portion of the output shaft within the general body housing and the lower radial bearing housing. An intermediate sleeve having a capture groove of an elongated predetermined width is threadedly attached to the output shaft. An interference structure that is secured to the general housing extends radially into the capture groove in a manner that prevents axial loads from being transmitted to the intermediate sleeve from the interference structure while the bearing assembly is intact.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: September 27, 2011
    Inventors: Thomas E. Falgout, Jr., Chad M. Daigle
  • Patent number: 8016051
    Abstract: A device for boring a well. The device is attached to a motor that has a power shaft for imparting rotational movement. The device includes a driver operatively connected to the power shaft, with the driver containing a cylindrical body, a first bit having a first end connected to the driver so that rotational movement of the driver is imparted to the first bit, and a sleeve disposed about the power shaft. The device further includes a housing disposed about the driver, and a second bit attached to the housing. Through engagement of cogs and pinions, rotation of the first bit in a first direction using the driver causes counter rotation of the second bit in an opposite direction, significantly reducing or eliminating reactive torque produced during drilling.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: September 13, 2011
    Assignee: Southard Drilling Technologies, L.P.
    Inventor: Robert Charles Southard
  • 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
  • Publication number: 20100212967
    Abstract: Drilling apparatus having a drillstring and operable to rotate the drillstring and operable to provide vibration axially to the drill head. Relies upon vibrational apparatus positioned to provide the vibration reliant upon interactive magnetic arrays, as a consequence of the relative rotation caused by a mechanical input to at least one array or set of arrays of the vibrational apparatus. One of the arrays or sets of arrays moves synchronously, in rotation, with the drillstring when the drillstring is rotated.
    Type: Application
    Filed: August 18, 2008
    Publication date: August 26, 2010
    Inventors: Peter Evan Powell, Gregory Donald West
  • Publication number: 20100212966
    Abstract: In one aspect of the invention, a downhole tool string component has at least one end adapted to connect to an adjacent tool sting component and a bore adapted to accommodate a flow of drilling fluid. A turbine is disposed within the bore and an actuating assembly is arranged such that a clutch may mechanically connect and disconnect with the turbine.
    Type: Application
    Filed: February 24, 2009
    Publication date: August 26, 2010
    Inventors: David R. Hall, Jonathan Marshall
  • Publication number: 20100187013
    Abstract: An interference structure is provided in a drilling motor to engage the motor drive shaft assembly if the thrust bearings fail and the drive shaft moves axially a preselected amount. The interference structure is protected from wear common to drilling motor use. The structure assures the recovery of all drilling motor parts if all thrust bearings fail.
    Type: Application
    Filed: January 26, 2009
    Publication date: July 29, 2010
    Applicant: TOMAHAWK DOWNHOLE LLC
    Inventors: Thomas E. Falgout, JR., Chad M. Daigle
  • Publication number: 20100187009
    Abstract: The present invention relates to systems and methods for controlling downhole motors and drilling systems incorporating such systems and methods. One aspect of the invention provides a downhole drilling system including: a downhole motor, a transmission coupled to the downhole motor, and a drill bit coupled to the transmission. Another aspect of the invention provides a method of drilling a borehole in a subsurface formation including the steps of: providing a drill string including a downhole motor, a transmission coupled to the downhole motor, and a drill bit coupled to the transmission; and rotating the drill string while flowing a fluid through the drill string to the downhole motor, thereby powering the downhole motor, thereby rotating the transmission and the drill bit.
    Type: Application
    Filed: January 27, 2009
    Publication date: July 29, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Joachim Siher, Guy James Rushton
  • Patent number: 7712549
    Abstract: A drilling tool (10) includes a pilot bit (14) and a plurality of mills (16) encircling the pilot bit. The pilot bit and the plurality of mills are each driven by a separate, hydraulically powered turbine or positive displacement motor. (20) The drilling tool does not include a transmission for transmitting power from the turbine or motor to any of the plurality of mills or the pilot bit.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: May 11, 2010
    Assignee: Dennis Tool Company
    Inventors: Mahlon Dennis, Thomas Dennis, Eric Twardowski
  • Patent number: 7703550
    Abstract: A down hole motor assembly with a locking mechanism, and methods for operating said down hole motor assembly. The down hole motor has a housing operatively connectable at an upper end to a drill string. A shaft is disposed within the housing and operatively connected to a motor portion of the down hole motor. A locking mechanism is configured to selectively transmit torque from the housing to the shaft when engaged.
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: April 27, 2010
    Assignee: Smith International, Inc.
    Inventors: Kenneth M. Nevlud, Timothy P. Beaton
  • Patent number: 7673707
    Abstract: A device for boring a well. The device is attached to a motor that has a power shaft for imparting rotational movement. The device comprises a driver operatively connected to the power shaft, with the driver containing a tubular body, a first bit having a first end connected to the driver so that rotational movement of the driver is imparted to the first bit, and a sleeve disposed about the power shaft, and wherein the sleeve has a radial shoulder. The device further comprises a housing disposed about the driver and a second bit attached to the housing. A plurality of nozzles is operatively placed within the driver, and the nozzles deliver fluid flow to the second bit. The device may further include a planetary gear anchored to the radial shoulder, and wherein the planetary gear is adapted for imparting rotation from the driver to the housing in a counter radial direction.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: March 9, 2010
    Inventor: Robert Charles Southard
  • Publication number: 20090321136
    Abstract: A device for boring a well. The device is attached to a motor that has a power shaft for imparting rotational movement. The device includes a driver operatively connected to the power shaft, with the driver containing a cylindrical body, a first bit having a first end connected to the driver so that rotational movement of the driver is imparted to the first bit, and a sleeve disposed about the power shaft. The device further includes a housing disposed about the driver, and a second bit attached to the housing. Through engagement of cogs and pinions, rotation of the first bit in a first direction using the driver causes counter rotation of the second bit in an opposite direction, significantly reducing or eliminating reactive torque produced during drilling.
    Type: Application
    Filed: August 31, 2009
    Publication date: December 31, 2009
    Inventor: Robert Charles Southard
  • Patent number: 7624819
    Abstract: A universal joint assembly includes an assembly housing, an assembly cap coupled to the assembly housing, a rotatable mandrel, a plurality of substantially spherical drive balls, and a floating washer. The assembly housing has a plurality of pockets formed in an interior surface of the assembly housing. The rotatable mandrel is fitted within a cavity defined by the assembly housing and the assembly cap and has a plurality of pockets configured to partially receive the drive balls. The substantially spherical drive balls are rotatable within the cavity about a central axis of the mandrel. A substantially circular groove formed in the cavity is defined by a proximal end of the assembly cap and an interior wall and a shoulder of the assembly housing. The floating washer is disposed within the substantially circular groove and configured to radially displace within the groove.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: December 1, 2009
    Assignee: Coiled Tubing Rental Tools, Inc.
    Inventors: Randy LeBlanc, Carl LeBlanc
  • Patent number: 7600586
    Abstract: A downhole tool string component, having a first rotor secured within a bore of the component and connected to a gear assembly, the gear assembly being connected to a second rotor. The gear assembly has a gear ratio adapted to rotate the second rotor faster than the first rotor. The second rotor is in magnetic communication with a stator which has an electrically conductive coil, the electrically conductive coil being in communication with a load.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: October 13, 2009
    Inventors: David R. Hall, Jim Shumway
  • Publication number: 20090173542
    Abstract: A down-the-hole vibratory unit for a drilling system includes a casing comprising a fluid inlet, and a plurality of eccentrically weighted rotor assemblies positioned at least partially within the casing and in fluid communication with the inlet, the eccentrically weighted rotor assemblies that are unbalanced relative to a central axis and are configured to rotate in response to a fluid flow directed thereto to apply centrifugal forces to the casing.
    Type: Application
    Filed: November 25, 2008
    Publication date: July 9, 2009
    Applicant: LONGYEAR TM, INC.
    Inventors: George Ibrahim, Christopher L. Drenth, Anthony Lachance
  • Patent number: 7549467
    Abstract: 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 wellbore tool.
    Type: Grant
    Filed: March 10, 2007
    Date of Patent: June 23, 2009
    Assignee: Dexter Magnetic Technologies, Inc.
    Inventors: William J. McDonald, Timothy F. Price, Gareth P. Hatch
  • Patent number: 7497279
    Abstract: In one aspect of the present invention a downhole tool string has a rotor secured within a bore and connected to a jack element that is substantially coaxial with the rotor. A portion of the jack element extends out of an opening formed in a working face of a drill bit located at the bottom of the drill string. The jack element is adapted to rotate independent of the drill bit when the rotor and drill bit are in operation.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: March 3, 2009
    Inventors: David R. Hall, Jim Shumway
  • Patent number: 7481283
    Abstract: A wellbore motor includes a means for converting flow of fluid in the wellbore into rotational energy. A magnetic gear member is operatively coupled at an input thereof to the means for converting. A wellbore rotary tool is coupled to an output of the magnetic gear member.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: January 27, 2009
    Assignee: Dexter Magnetic Technologies, Inc.
    Inventors: William J. McDonald, Timothy F. Price, Gareth P. Hatch
  • Patent number: 7467672
    Abstract: An orienting apparatus including at least one housing element configured to couple with a drill string; an actuator disposed inside the at least one housing element; a nozzle coupled to the actuator; a torque generator coupled to the actuator and extending axially downward through the at least one housing, wherein the torque generator is configured to rotate in a first direction as it moves downward; a mandrel coupled to the torque generator; and a stroke adjuster at least partially disposed in an upper end of the mandrel, wherein rotation in the first direction is caused by an increase in differential pressure is disclosed.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: December 23, 2008
    Assignee: Smith International, Inc.
    Inventor: Brian Cruickshank
  • Patent number: 7445061
    Abstract: A bearing assembly is situated to conduct axial forces between the general housing and the output shaft by way of an intermediate sleeve that is secured to the output shaft outside the general housing and is axially confined by a bearing assembly secured to the general housing.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: November 4, 2008
    Inventors: Thomas E. Falgout, Sr., Chad M. Daigle
  • Publication number: 20080264693
    Abstract: The invention relates to a drive system, in particular a downhole drilling assembly (10). In the preferred embodiment, a bearing mechanism (14,24) of the assembly (10) is isolated from a gear mechanism (20) of the assembly (10), to prevent failure of the bearing mechanism (14, 24) due to vibration and heat generated by the gear mechanism (20) in use. A lower bearing unit (24) of the bearing mechanism (24) is coupled to the gear mechanism (20) by a shock eliminating coupling assembly (22), which prevents the transmission of shock loads to the gear mechanism (20). Also, the gear mechanism (20) is coupled through a shock eliminating coupling assembly (18) to a turbine (16) and thus to an upper bearing unit (14). Sealing assemblies (60, 116) are provided for the gear mechanism (20) and the upper bearing unit (14) to prevent drilling fluid ingress and consequent damage. The assembly (10) may also carry a torsionally flexible drive shaft (46).
    Type: Application
    Filed: July 3, 2008
    Publication date: October 30, 2008
    Inventors: Andrew McPherson Downie, Guido Ernesto Pezzani
  • Publication number: 20080264692
    Abstract: A locking clutch to selectively transmit torque from a stator of a downhole tool to a rotor of the downhole tool includes at least one locking pawl disposed upon the rotor, wherein the at least one locking pawl comprises a load path, a pivot axis, and a mass center, wherein the at least one locking pawl is biased into an engaged position by a biasing mechanism, wherein the at least one locking pawl transmits force from the stator to the rotor along the load path when in the engaged position, and wherein centrifugal force urges the at least one locking pawl into a disengaged position when the rotor is rotated above a disengagement speed.
    Type: Application
    Filed: April 30, 2007
    Publication date: October 30, 2008
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Lance D. Underwood, James Edmond Beylotte
  • Patent number: 7419018
    Abstract: In one aspect of the invention, a downhole drill string component has a shaft being axially fixed at a first location to an inner surface of an opening in a tubular body. A mechanism is axially fixed to the inner surface of the opening at a second location and is in mechanical communication with the shaft. The mechanism is adapted to elastically change a length of the shaft and is in communication with a power source. When the mechanism is energized, the length is elastically changed.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: September 2, 2008
    Inventors: David R. Hall, Scott Dahlgren, Tyson J. Wilde
  • Patent number: 7416034
    Abstract: The invention relates to a drive system, in particular a downhole drilling assembly (10). In the preferred embodiment, a bearing mechanism (14, 24) of the assembly (10) is isolated from a gear mechanism (20) of the assembly (10), to prevent failure of the bearing mechanism (14, 24) due to vibration and heat generated by the gear mechanism (20) in use. A lower bearing unit (24) of the bearing mechanism (24) is coupled to the gear mechanism (20) by a shock eliminating coupling assembly (22), which prevents the transmission of shock loads to the gear mechanism (20). Also, the gear mechanism (20) is coupled through a shock eliminating coupling assembly (18) to a turbine (16) and thus to an upper bearing unit (14). Sealing assemblies (60, 116) are provided for the gear mechanism (20) and the upper bearing unit (14) to prevent drilling fluid ingress and consequent damage. The assembly (10) may also carry a torsionally flexible drive shaft (46).
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: August 26, 2008
    Assignee: Smith International, Inc.
    Inventors: Andrew McPherson Downie, Guido Ernesto Pezzani
  • Publication number: 20080196901
    Abstract: A downhole tractor assembly that is configured for open-hole applications and of a self-aligning nature. The self-aligning nature of the assembly is effectuated through a tractor portion which is rotable about an axis of an elongated body of the assembly independent of a separate centralizing portion of the assembly. That is, the tractor portion, configured for interfacing an open-hole well wall of potentially irregular morphology, is independently rotable so as to maintain a position of substantially optimized driving friction at the interface during tractoring. Maintenance of optimized driving friction in this manner may occur irrespective of the orientation of the centralizing portion of the assembly.
    Type: Application
    Filed: November 7, 2007
    Publication date: August 21, 2008
    Inventors: Franz Aguirre, Todor K. Sheiretov, Keith R. Nelson
  • Patent number: 7410013
    Abstract: An apparatus (10) for use in boring is described, the apparatus including a rotatable drive shaft (12), a cam member (20) and followers (16) for converting rotational motion into reciprocal motion, and a shroud (24) having a cutting edge (26) driven by the cam member and followers. The shroud may be selectively engageable with the cam member and followers, allowing the drive shaft to be removed through the shroud. A fluid circulation arrangement (31), (13) allows air to be injected into loose drilling substrate, so assisting removal of drill cuttings from the boring apparatus. Also described is a drill string incorporating a similar arrangement, allowing the drill string to be reciprocated within a bore. The drill string may further include casing sections, which may have intumescent coatings to allow the sections to be fixed in a wellbore.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: August 12, 2008
    Assignee: Wave Craft Limited
    Inventor: Hugh Edward Fisher
  • Patent number: 7405998
    Abstract: Apparatuses and methods for generating fluid pressure pulses are disclosed. An example apparatus may include a chamber that can collect fluid and an upstream ported disc coupled to a downstream end of the chamber. The upstream ported disc may rotate about a central axis. The upstream ported disc includes an upstream eccentric port that rotates about the central axis as the upstream ported disc rotates. The example apparatus may include a downstream ported disc coupled to a downstream end of the upstream ported disc such that the downstream ported disc remains substantially rotationally fixed relative to the upstream ported disc. The downstream ported disc includes a downstream eccentric port that may align with the upstream eccentric port to form a passageway for fluid to exit from the chamber to outside of the apparatus, at some time in a rotation cycle of the upstream ported disc.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: July 29, 2008
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Earl D. Webb, Iosif J. Hriscu, Perry Courville, Robert Pipkin