With Fluid Pressure-actuated Feed Means Patents (Class 175/228)
  • Patent number: 9523244
    Abstract: A down-hole drilling apparatus includes a bearing housing defining a longitudinal axis and upper and lower portions. The upper portion of the bearing housing is configured for connection to a drill string, and at least one annular bearing package disposed within the bearing housing. A drill bit is coupled to the bearing housing and rotatable with respect to the longitudinal axis. The drill bit includes a leading body supporting a plurality of cutters thereon for engaging a subterranean rock formation, a shank portion projecting from the leading body, and a mandrel portion engaging the shank portion and defining an inseparable connection therewith. The mandrel portion extends longitudinally into the bearing housing and through the at least one annular bearing package.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: December 20, 2016
    Assignee: SCIENTIFIC DRILLING INTERNATIONAL, INC.
    Inventor: Gerald Heisig
  • Patent number: 9204869
    Abstract: A surgical access port and method for achieving articulation is disclosed, the surgical access port including a housing, at least one lumen extending through the housing, and an articulation structure. The housing comprises an access member having a proximal end and a distal end, and defines a longitudinal axis. The lumen in the housing extends from the proximal to the distal end of the access member along the longitudinal axis. The articulation structure comprises a first tubular member and a second tubular member, the second tubular member hingably attached to the first tubular member, and an articulation element slidably attached to the first tubular member.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: December 8, 2015
    Assignee: Covidien LP
    Inventors: Gennady Kleyman, Eric Taylor
  • Patent number: 9133666
    Abstract: An expandable downhole tool apparatus includes a body adapted to be incorporated into a drill string and at least one working member moveable relative to the body between an inward deactivated position and an outwardly deployed activated position in order to engage the wall of a borehole. An activation device moves at least one working member between the inward deactivated position and outwardly deployed activated position. At least one passage is formed through the body and extends from a location on the body adjacent at least one working member to a location remote from the respective working member to enable debris accumulating underneath the respective working member to move along the passage and exit the body.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: September 15, 2015
    Inventor: Paul Bernard Lee
  • Patent number: 8973677
    Abstract: A housing, mandrel and bearing assembly positionable in a wellbore includes a torque transmission member adapted to connect to a source of rotational torque (e.g. a downhole motor power output) and a tubular mandrel adapted to connect to a drill bit. A lower tubular housing is adapted to contain a lower bearing and catch sleeve assembly. The catch assembly is adapted to retain the mandrel in the lower housing if the mandrel breaks. An upper tubular housing contains an upper bearing and is adapted to connect to a housing of the downhole motor. A method of assembling the downhole housing, mandrel and bearing assembly is disclosed.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: March 10, 2015
    Assignee: Coiled Tubing Rental Tools, Inc.
    Inventors: Randall C. LeBlanc, Carl S. LeBlanc
  • Patent number: 8869917
    Abstract: A downhole housing, mandrel and bearing assembly 100 includes a flex shaft 20 adapted to connect to a downhole motor power output 309 and a tubular mandrel 30 adapted to connect to a drill bit 370. A lower tubular housing 60 is adapted to contain a lower bearing assembly 90 and catch sleeve assembly 110. The catch assembly 110 is adapted to retain the mandrel 30 in the lower housing if the mandrel breaks. An upper tubular housing 70 contains an upper bearing assembly 80 and is adapted to connect to a housing 302 of the downhole motor 301. A method of assembling the downhole housing, mandrel and bearing assembly 100 is disclosed.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 28, 2014
    Assignee: Coiled Tubing Rental Tools, Inc.
    Inventors: Randall C. LeBlanc, Carl S. LeBlanc
  • Patent number: 8865309
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: October 21, 2014
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Patent number: 8800689
    Abstract: A drill bit of the type used to drill a wellbore in the earth can comprise a bore formed in the drill bit, and a plug sealingly and reciprocably disposed in the bore, whereby the plug prevents fluid communication between sections of the bore in the drill bit. The plug can comprise a spherically-shaped member. The plug can comprise a floating plug sealingly and reciprocably disposed in the bore, whereby pressure in the different sections of the bore on respective opposite sides of the plug is substantially equalized.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: August 12, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Michael B. Crawford
  • Publication number: 20130153304
    Abstract: A drill bit of the type used to drill a wellbore in the earth can comprise a bore formed in the drill bit, and a plug sealingly and reciprocably disposed in the bore, whereby the plug prevents fluid communication between sections of the bore in the drill bit. The plug can comprise a spherically-shaped member. The plug can comprise a floating plug sealingly and reciprocably disposed in the bore, whereby pressure in the different sections of the bore on respective opposite sides of the plug is substantially equalized.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 20, 2013
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Halliburton Energy Services, Inc.
  • Patent number: 8383559
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: February 26, 2013
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Patent number: 8347986
    Abstract: Roller cone drill bits may be provided with pressure relief mechanisms operable to control lubricant pressure within respective lubricant systems. Each lubricant system may be enclosed and isolated from downhole well fluids. Portions of each pressure relief mechanism may be completely surrounded by lubricant to increase downhole life of associated operating mechanisms and to produced more repeatable and more reliable opening and closing of the pressure relief mechanism. The downhole drilling life of bearing surfaces, fluid seals and other supporting structures associated with roller cones mounted on support arms of such roller cone drill bits may be substantially increased. Each pressure relief mechanism may be locked in a closed position to assist with filling the respective lubricant system with lubricant.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: January 8, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Seth Garrett Anderele
  • Patent number: 8141662
    Abstract: What is claimed is a downhole lubrication system comprising a drill string component comprising an outer diameter and an inner bore. A reservoir may be disposed intermediate the outer diameter and inner bore. A piston may be disposed at least partially within the reservoir. At least one channel may extend from the reservoir to a bearing surface. As drilling fluid is passed through the inner bore, the piston may be pressurized, urging lubricant toward the bearing surface via the at least one channel.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: March 27, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Francis Leany, Michael Beazer, Casey Webb
  • Patent number: 8069934
    Abstract: A device including a drill bit is disclosed. The bit preferably comprises lug members, joined by a support member, each lug member includes a through hole, bearings rotatably mounted on the lug members which bearings support cutter members, a sleeve with lubricant mounted upon the support member, a central channel within the sleeve whose lower end can be closed or opened with a reciprocating valve-plate, an annular piston snug-fitting between the sidewalls of sleeve and central channel, which piston has a discharge valve outletting the lubricant through the piston, a spring disposed in the sleeve, rods mounted in the sleeve and inserted through the holes, lubrication channels arranged in the lug members and communicating the lower portion of sleeve with the bearings for lubrication thereof. The rods are coupled to the piston and the valve-plate. Embodiments include shafts supporting the bearings. Some shafts are hollow and have a coolant system.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: December 6, 2011
    Inventors: Yuriy Yatsenko, Boris Avramchuk, Siarhei Zmitkovich
  • Patent number: 8020637
    Abstract: What is claimed is a downhole lubrication system comprising a drill string component comprising an outer diameter and an inner bore. A reservoir may be disposed intermediate the outer diameter and inner bore. A piston may be disposed at least partially within the reservoir. At least one channel may extend from the reservoir to a bearing surface. As drilling fluid is passed through the inner bore, the piston may be pressurized, urging lubricant toward the bearing surface via the at least one channel.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 20, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Francis Leany, Michael Beazer, Casey Webb
  • Patent number: 7975782
    Abstract: An earth bit includes a cutting cone mounted to a lug to form a bearing cavity. A valve is in fluid communication with the bearing cavity and a bit chamber, wherein the valve includes a diaphragm with an aperture. The aperture is repeatably moveable between open and closed conditions in response to a pressure difference between the material in the bearing cavity and bit chamber.
    Type: Grant
    Filed: August 18, 2007
    Date of Patent: July 12, 2011
    Assignee: Atlas Copco Secoroc LLC
    Inventor: Gregory W. Peterson
  • Publication number: 20100326735
    Abstract: What is claimed is a downhole lubrication system comprising a drill string component comprising an outer diameter and an inner bore. A reservoir may be disposed intermediate the outer diameter and inner bore. A piston may be disposed at least partially within the reservoir. At least one channel may extend from the reservoir to a bearing surface. As drilling fluid is passed through the inner bore, the piston may be pressurized, urging lubricant toward the bearing surface via the at least one channel.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Inventors: David R. Hall, Francis Leany, Micheal Beazer, Casey Webb
  • Publication number: 20100326736
    Abstract: What is claimed is a downhole lubrication system comprising a drill string component comprising an outer diameter and an inner bore. A reservoir may be disposed intermediate the outer diameter and inner bore. A piston may be disposed at least partially within the reservoir. At least one channel may extend from the reservoir to a bearing surface. As drilling fluid is passed through the inner bore, the piston may be pressurized, urging lubricant toward the bearing surface via the at least one channel.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Inventors: David R. Hall, Francis Leany, Michael Beazer, Casey Webb
  • Publication number: 20100300762
    Abstract: A device including a drill bit is disclosed. The bit preferably comprises lug members, joined by a support member, each lug member includes a through hole, bearings rotatably mounted on the lug members which bearings support cutter members, a sleeve with lubricant mounted upon the support member, a central channel within the sleeve whose lower end can be closed or opened with a reciprocating valve-plate, an annular piston snug-fitting between the sidewalls of sleeve and central channel, which piston has a discharge valve outletting the lubricant through the piston, a spring disposed in the sleeve, rods mounted in the sleeve and inserted through the holes, lubrication channels arranged in the lug members and communicating the lower portion of sleeve with the bearings for lubrication thereof. The rods are coupled to the piston and the valve-plate. Embodiments include shafts supporting the bearings. Some shafts are hollow and have a coolant system.
    Type: Application
    Filed: May 27, 2009
    Publication date: December 2, 2010
    Inventors: Yuriy Yatsenko, Boris Avramchuk, Siarhei Zmitkovich
  • Patent number: 7665547
    Abstract: A rotary rock bit includes a lubricant reservoir with a pressure compensation assembly disposed therein. The pressure compensation assembly is adapted to permit selective adjustment of the relief pressure set by the assembly through the selective adjustment of one member in the assembly with respect to another member in the assembly.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: February 23, 2010
    Assignee: Smith International, Inc.
    Inventors: Zhou Yong, George B. Witman, IV, Carlos Torres
  • Publication number: 20090260888
    Abstract: A drill bit for drilling a wellbore, the drill bit having a body and at least one bearing. A rotary cone is rotatably attached to the bit body at the bearing. A lubricant reservoir is located in an inner portion of the bit body and is in fluid communication with the bearing. A communication port leads from the inner portion of the bit body to the exterior of the bit body. A fiber reinforced elastomeric pressure compensator diaphragm separates lubricant in the lubricant reservoir from the communication port.
    Type: Application
    Filed: April 21, 2009
    Publication date: October 22, 2009
    Applicant: Baker Hughes Incorporated
    Inventors: Aaron J. Dick, Terry J. Koltermann, Chih Lin, Stefan M. Butuc, Cameron Field-Eaton
  • Publication number: 20090194335
    Abstract: The invention relates to a roller assembly for a rotary roller reamer. The roller assembly includes a roller pin and a crushing roller. The crushing roller is arranged to be mounted on the roller pin and to rotate thereabout. The roller assembly is connected together so as to form a single cartridge which can be inserted into a pocket of the rotary roller reamer and secured thereto using a single fastener device.
    Type: Application
    Filed: April 14, 2009
    Publication date: August 6, 2009
    Applicant: EXTREME MACHINING AUSTRALIA PTY LTD
    Inventors: John Francis Kennedy, Michael Desmond Slattery
  • Patent number: 7530409
    Abstract: The invention relates to a roller assembly for a rotary roller reamer. The roller assembly includes a roller pin and a crushing roller. The crushing roller is arranged to be mounted on the roller pin and to rotate thereabout. The roller assembly is connected together so as to form a single cartridge which can be inserted into a pocket of the rotary roller reamer and secured thereto using a single fastener device.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: May 12, 2009
    Assignee: Extreme Machining Australia Pty Ltd.
    Inventors: John Francis Kennedy, Mathew John Kennedy, Michael Desmond Slattery
  • Publication number: 20080105467
    Abstract: A rotary rock bit includes a lubricant reservoir with a pressure compensation assembly disposed therein. The pressure compensation assembly is adapted to permit selective adjustment of the relief pressure set by the assembly through the selective adjustment of one member in the assembly with respect to another member in the assembly.
    Type: Application
    Filed: November 17, 2006
    Publication date: May 8, 2008
    Inventors: Zhou Yong, George B. Witman, Carlos Torres
  • Publication number: 20080041628
    Abstract: Lubricating nutating single cone drill bit (10, 100) includes bit shank (12, 112) with axially skewed journal (18, 118) rotatably retaining cutter body (22, 122). Bearings (26, 28, 30, 32; 126, 128, 130, 132) can enable rotation of cutter body (22, 122). Lubricant can be dispensed to a gap between journal (18, 118) and cutter body (22, 122) from lubricant chamber (76; 176, 179) having plunger (80; 180, 183), the gap bounded by first (66, 166) and second (68, 168) radial dynamic seals. Fluid passage (90, 190) extending through bit (10, 100) can communicate with fluid inlet port (88, 188) on proximal end (16, 116) of bit shank (12, 122). Fluid passage (90, 190) can further communicate with first fluid outlet port (98, 198) on distal end (36, 136) of journal (18, 118) and with second fluid outlet port (94, 194) formed on lateral portion of bit shank (12, 112).
    Type: Application
    Filed: October 19, 2006
    Publication date: February 21, 2008
    Inventor: Allen Kent Rives
  • Publication number: 20080041630
    Abstract: An earth bit includes a cutting cone mounted to a lug to form a bearing cavity. A valve is in fluid communication with the bearing cavity and a bit chamber, wherein the valve includes a diaphragm with an aperture. The aperture is repeatably moveable between open and closed conditions in response to a pressure difference between the material in the bearing cavity and bit chamber.
    Type: Application
    Filed: August 18, 2007
    Publication date: February 21, 2008
    Applicant: ATLAS COPCO SECOROC LLC
    Inventor: Gregory W. Peterson
  • Patent number: 7240745
    Abstract: A lubricating nutating single cone drill bit 10 is disclosed. Bit 10 includes a bit shank 12 with an axially skewed bore 18 rotatably retaining a cutter body 22. A plurality of cutter elements (46, 48) are affixed to the cutter body 22. Bearings (26, 28, 30, 32) enable rotation of the cutter body 22 and lubricant is dispensed to the bearings from a lubricant chamber (76, 76?) by a plunger 80 driven by drilling fluid. A method to drill includes attaching the bit 10 to a drill string, engaging the bit 10 into a formation (WB), pumping a drilling fluid into a plunger 80 in the lubricant chamber 76 to dispense lubricant to the bearings (26, 28, 30, 32). The method can include pumping the drilling fluid through a fluid passage 90 in the bit 10 and out of a low pressure orifice 94 on the cutter body 22.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: July 10, 2007
    Inventor: Allen Kent Rives
  • Patent number: 7237627
    Abstract: Methods and apparatus for maintaining lubrication of rolling cone cutters mounted on journal pins. Embodiments comprise a rotating cone disposed on a journal pin and forming a journal gap there between. A cylindrical journal sleeve is disposed in the journal gap. The journal sleeve has a longitudinal gap forming opposing end portions, which are continuously contoured. A lubrication port is disposed in the journal pin and in fluid communication with a lubrication supply. The lubrication port has an outlet located in a recess in the journal gap. Each end of the recess comprises a transitioning surface extending between the bottom of the recess and the outer surface of the journal pin to prevent sharp transitions. In certain embodiments, the journal pin may comprise two or more lubrication ports, each located in a recess with transitioning surfaces.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: July 3, 2007
    Assignee: Smith International, Inc.
    Inventors: Lance T. Richman, Chris Edward Cawthorne, Kirk A. Norris, Robert H. Slaughter, Jr.
  • Patent number: 7128171
    Abstract: An earth boring bit has rotating cones with two lubricant passages to increase bearing capacity and cause lubricant circulation. A lubricant reservoir in the body supplies lubricant to passages between the cone and bearing pin. A pressure compensator equalizes lubricant pressure to the exterior of the bit. A first passage leads from the reservoir to the upper side of the bearing pin. A second passage leads from the reservoir to the bearing pin at a point from 185 degrees to 225 degrees as seen from an inner end of the bearing pin. This point is located in a diverging region 51d of an annular clearance surrounding the bearing pin.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: October 31, 2006
    Assignee: Baker Hughes Incorporated
    Inventors: Aaron J. Dick, Chih C. Lin
  • Patent number: 7121365
    Abstract: A lubricating grease is specific for a rock bit for drilling subterranean formations. The rock bit body includes a plurality of journal pins, each having a bearing surface, with a cutter cone mounted on each journal pin and also including a bearing surface. A grease reservoir provides lubricating grease to such bearing surfaces. The grease composition adjacent the bearing surfaces comprises a lubricating base oil, sufficient thickener and additives in the base oil to form a rock bit grease, and an effective amount of polarized graphite.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: October 17, 2006
    Assignee: Smith International, Inc.
    Inventors: Robert M. Denton, Alan W. Lockstedt
  • Patent number: 6802380
    Abstract: A roller-cone rock bit in which the compensation reservoir is integrated with a hydrostatically-asymmetric seal, such as a V-seal, which provides pressure relief. This seal not only relieves overpressure during filling, and when the grease thermally expands as the bit first goes downhole, but also compensates transient overpressures during operation.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: October 12, 2004
    Assignee: Halliburton Energy Services Inc.
    Inventor: Mark P. Blackman
  • Patent number: 6789634
    Abstract: O-ring seals for rock bit bearings comprise a body formed from an elastomeric material having a lubricant additive in at least the dynamic seal surface to reduce the coefficient of friction and stick-slip amplitude at O-ring seal surfaces. The lubricant additive comprises polarized graphite. O-ring seals made from elastomeric compositions comprise in the range of from about 50 to 99 percent by volume elastomeric material, and in the range of from about 1 to 50 percent by volume of the polarized graphite based on the total volume of the composition. Preferably, the polarized graphite is in the range of from 7 to 25 percent by volume. As the O-ring seal experiences wear from adjacent metal surfaces, flakes of polarized graphite are released from the O-ring seal and adhere to the adjacent metal surfaces and form a lubricating film.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: September 14, 2004
    Assignee: Smith International, Inc
    Inventor: Robert Denton
  • Patent number: 6619412
    Abstract: A rotary cone rock bit, comprises a bit body including a plurality of legs extending therefrom, each of the legs having an outer surface that includes a leading surface and a trailing surface, a roller cone rotatably supported on each of the legs, a bearing system between each cone and the leg on which it is supported, and a lubricant reservoir in fluid communication with the bearing system. The reservoir can be provided with a wear resistant plug, if desired. In the present bit, the reservoir has at least one opening positioned in either the leg's leading surface, trailing surface, center surface, shoulder surface or some combination of these. Alternatively, the reservoir can be formed inside the bit body, preferably by a canister or the like, which can be provided with a venting as desired.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: September 16, 2003
    Assignee: Smith International, Inc.
    Inventors: Robert H. Slaughter, Jr., Peter T. Cariveau, Kirk A. Norris, Roger Didericksen, William M. Conn
  • Patent number: 6595281
    Abstract: The apparatus (10) for delivering grease through the individual string (12) includes a tubular member (14) for holding a supply of grease, a piston (16) sealing slidable through the tubular member (14) and a first valve (18) coupled to a downstream end (20) of the member (14). Valve (18) has a body (22) provided with orifices (24) and a collar (26) slidably mounted over an end of the body (22) and biased to a sealing position in which it seals the orifices (24). Piston (16) is initially located above an upstream end (28) of the tubular member (14). Apparatus (10) is slid through the drill string (12) until collar (26) abuts a stub, typically a core bit retained at the end of the string. Fluid pressure is then applied to apparatus (10) by pumping water or mud down the drill pipe (12). This forces collar (26) to be displaced in covering the orifices (24).
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: July 22, 2003
    Assignee: Industrial Innovations & Concepts PTY LTD
    Inventor: Andrew Beach
  • Patent number: 6578647
    Abstract: A sealing structure for a rock drill bit includes an elastomeric diaphragm for installation in the drill bit so as to separate grease from drilling mud. The diaphragm has an aperture extending through it, and a plug is disposed in the aperture so as to form a mechanical seal with a wall of the aperture. The plug has a channel therethrough which is normally held sealed by a face of the aperture in the diaphragm. If the pressure of the grease exceeds pressure in mud on the other side of the diaphragm by more than a critical value, the diaphragm aperture deforms and allows grease to move through the plug channel and escape. The critical value can be varied by using, with the same diaphragm, plugs having different numbers, sizes and axial positions of plug channels.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: June 17, 2003
    Assignee: James Walker & Company Limited
    Inventors: Nigel M. Page, Philip D. Embury
  • Patent number: 6568489
    Abstract: A lubricant ejector used downhole has a reservoir holding replenishment lubricant, and it includes a driver to eject at least a portion of the lubricant. A flow coupler connected to the ejector channels lubricant to a connected apparatus. One specific ejector includes a hollow rotor of a downhole motor, and a specific flow coupler includes a cross-channel diverter that directs lubricant from the hollow interior of the rotor to a bearing pack and that directs drilling fluid, used to drive the motor and create pressure that moves a piston in the rotor, from outside the rotor to inside a passageway through the bearing pack. A method includes injecting lubricant from a reservoir in the downhole motor into the bearing pack as the downhole motor operates.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: May 27, 2003
    Inventor: Charles D. Hailey
  • Patent number: 6561269
    Abstract: Canister, sealing method and composition for sealing a borehole. The canister includes a container with slurry inside the container, one or more slurry exits at one end of the container, a pump at the other end of the container, and a piston inside that pushes the slurry though the slurry exit(s), out of the container, and into a borehole. An inflatable packer outside the container provides stabilization in the borehole. A borehole sealing material is made by combining an oxide or hydroxide and a phosphate with water to form a slurry which then sets to form a high strength, minimally porous material which binds well to itself, underground formations, steel and ceramics.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: May 13, 2003
    Assignee: The Regents of the University of California
    Inventors: Donald W. Brown, Arun S. Wagh
  • Publication number: 20030062200
    Abstract: A roller-cone rock bit in which the compensation reservoir is integrated with a hydrostatically-asymmetric seal, such as a V-seal, which provides pressure relief. This seal not only relieves overpressure during filling, and when the grease thermally expands as the bit first goes downhole, but also compensates transient overpressures during operation.
    Type: Application
    Filed: September 3, 2002
    Publication date: April 3, 2003
    Applicant: Halliburton Energy Services, Inc.
    Inventor: Mark P. Blackman
  • Publication number: 20020108788
    Abstract: A bit is provided having at least one leg extending downwardly and inwardly from the bit body. A cutter cone is rotatably mounted on a shaft extending inwardly from the lower portion of each leg. The annular space defined by the base of the shaft and the inner surface at the base of the cone forms a seal gland. An elastomeric o-ring sealingly engages an inner surface of the cone and a first rigid ring which rotates with the o-ring and cone. The o-ring energizes the first rigid ring for sealingly engaging a second rigid ring mounted to the leg of the bit near the base of the shaft. The second rigid ring is secured to and seals against a surface at the base of the shaft and is held stationary relative to the surface. A lubricant passage for lubricating the seal is pressurized by the drilling fluid pressure in the center of the bit body.
    Type: Application
    Filed: February 15, 2001
    Publication date: August 15, 2002
    Inventors: Gregory W. Peterson, Howard J. Walk
  • Patent number: 6390209
    Abstract: A pressure compensating assembly for use in roller cone drilling bits of the sealed bearing type. The compensating assembly includes a hollow body arranged to fit into a cavity in the bit connected with the lubrication system of the bit and the hollow body includes a normally open lubricant passageway extending therethrough. A seal encircles the body on one side of the lubricant passageway and is arranged to sealingly engage the bit and an elastomeric, cup-shaped diaphragm is located on the body and has a lip arranged to sealingly engage the bit on the other side of the lubricant passageway. The diaphragm having a protuberance on the side of the diaphragm facing the passageway and sized to enter and close the passageway. The body, seal, and diaphragm being assembled into a unitary cartridge for introduction into the bit as a unit.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: May 21, 2002
    Assignee: Dresser Industries, Inc.
    Inventor: William C. Saxman
  • Publication number: 20010050187
    Abstract: A rotary cone rock bit, comprises a bit body including a plurality of legs extending therefrom, each of the legs having an outer surface that includes a leading surface and a trailing surface, a roller cone rotatably supported on each of the legs, a bearing system between each cone and the leg on which it is supported, and a lubricant reservoir in fluid communication with the bearing system. The reservoir can be provided with a wear resistant plug, if desired. In the present bit, the reservoir has at least one opening positioned in either the leg's leading surface, trailing surface, center surface, shoulder surface or some combination of these. Alternatively, the reservoir can be formed inside the bit body, preferably by means of a canister, which can be provided with venting means as desired.
    Type: Application
    Filed: August 17, 2001
    Publication date: December 13, 2001
    Inventors: Robert H. Slaughter, Peter T. Cariveau, Kirk A. Norris, Roger Didericksen, William M. Conn
  • Patent number: 6296067
    Abstract: A rotary cone rock bit, comprises a bit body including a plurality of legs extending therefrom, each of the legs having an outer surface that includes a leading surface and a trailing surface, a roller cone rotatably supported on each of the legs, a bearing system between each cone and the leg on which it is supported, and a lubricant reservoir in fluid communication with the bearing system. The reservoir can be provided with a wear resistant plug, if desired. In the present bit, the reservoir has at least one opening positioned in either the leg's leading surface, trailing surface, center surface, shoulder surface or some combination of these. Alternatively, the reservoir can be formed inside the bit body, preferably by means of a canister, which can be provided with venting means as desired.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: October 2, 2001
    Assignee: Smith International, Inc.
    Inventors: Robert H. Slaughter, Jr., Peter T. Cariveau, Kirk A. Norris, Roger Didericksen, William M. Conn
  • Publication number: 20010006124
    Abstract: A pressure compensating assembly for use in roller cone drilling bits of the sealed bearing type. The compensating assembly includes a hollow body arranged to fit into a cavity in the bit connected with the lubrication system of the bit and the hollow body includes a normally open lubricant passageway extending therethrough. A seal encircles the body on one side of the lubricant passageway and is arranged to sealingly engage the bit and an elastomeric, cup-shaped diaphragm is located on the body and has a lip arranged to sealingly engage the bit on the other side of the lubricant passageway. The diaphragm having a protuberance on the side of the diaphragm facing the passageway and sized to enter and close the passageway. The body, seal, and diaphragm being assembled into a unitary cartridge for introduction into the bit as a unit.
    Type: Application
    Filed: February 28, 2001
    Publication date: July 5, 2001
    Inventor: William C. Saxman
  • Patent number: 6230822
    Abstract: A drill bit for use in drilling operations in a wellbore, the drill bit having a bit body including a plurality of bit legs, each supporting a rolling cone cutter; a coupling member formed at an upper portion of said bit body; at least one temperature sensor for monitoring at least one temperature condition of said improved drill bit during drilling operations; and at least one temperature sensor cavity formed in said bit body and adapted for receiving, carrying, and locating said at least one temperature sensor in a particular position relative to said bit body which is empirically determined to optimize temperature sensor discrimination.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: May 15, 2001
    Assignee: Baker Hughes Incorporated
    Inventors: Eric Charles Sullivan, Theodore Edward Zaleski, Jr., Scott Ray Schmidt, Don Quy Nguyen, Glenn R. Zadrapa, Chih Lin
  • Patent number: 6213228
    Abstract: A pressure compensating assembly for use in roller cone drilling bits of the sealed bearing type. The compensating assembly includes a hollow body arranged to fit into a cavity in the bit connected with the lubrication system of the bit and the hollow body includes a normally open lubricant passageway extending therethrough. A seal encircles the body on one side of the lubricant passageway and is arranged to sealingly engage the bit and an elastomeric, cup-shaped diaphragm is located on the body and has a lip arranged to sealingly engage the bit on the other side of the lubricant passageway. The diaphragm having a protuberance on the side of the diaphragm facing the passageway and sized to enter and close the passageway. The body, seal, and diaphragm being assembled into a unitary cartridge for introduction into the bit as a unit.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: April 10, 2001
    Assignee: Dresser Industries Inc.
    Inventor: William C. Saxman
  • Patent number: 6209667
    Abstract: A fitting for reducing friction between a drilling string and the wall of a well. In a first aspect the fitting has recesses (6) provided along the bore of the fitting to lubricate the interface between the fitting and the drill string to minimise friction. In a second aspect a fitting is provided on a drill string having rotatable roller means (21) which can rotate about a point of rotation (23) so as to minimise both axial and rotational friction. According to a third aspect the fitting comprises an inner section (30) secured to a drill pipe (35) or other fitting and an outer section (31) rotatable about the inner section (30). Preferably a sealed bearing (36, 42-47, 37, 38) is provided between the inner section (30) and outer section (31).
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: April 3, 2001
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Geoffrey Neil Murray, Denis Robert Fernandes
  • Patent number: 6206110
    Abstract: A rotary cone rock bit, comprises a bit body including a plurality of legs extending therefrom, each of the legs having an outer surface that includes a leading surface and a trailing surface, a roller cone rotatably supported on each of the legs, a bearing system between each cone and the leg on which it is supported, and a lubricant reservoir in fluid communication with the bearing system. The reservoir can be provided with a wear resistant plug, if desired. In the present bit, the reservoir can be pressured-balanced with fluid in the bit plenum or the borehole annulus, or maintained at some desired differential with respect to either of these. Alternatively, the reservoir can be formed inside the bit body, preferably by means of a canister, which can be provided with venting means as desired.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: March 27, 2001
    Assignee: Smith International, Inc.
    Inventors: Robert H. Slaughter, Jr., Peter T. Cariveau, Kirk A. Norris, Roger Didericksen, William M. Conn
  • Patent number: 6202766
    Abstract: In a drill bit which has a reservoir for storing a supply of lubricant, generally grease, a lubricant passage is formed for flow of lubricant from the reservoir to the bearing. A relief port is formed in the drill bit body to connect at least one of the reservoir and the lubricant passage with an outside surface of the drill bit body. A normally-closed relief valve is mounted in the relief port to selectively permit fluid flow through the relief port and protect the lubrication system against changes in pressure, especially increases in pressure on the grease side, such as might be caused by thermal expansion of the grease or the production of off-gases by the grease. The valve is provided in the form of a small screw-in unit capable of separate manufacture and testing and comprises a valve body carrying a flexible diaphragm element. Venting is provided via a puncture in the diaphragm element.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: March 20, 2001
    Inventor: William L. Shepherd
  • Patent number: 6170611
    Abstract: A method and apparatus for loading lubricant into a bit chamber of an earth boring bit measures and controls the pressure of pressurized lubricant at the bit chamber while the lubricant is being loaded into the bit.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: January 9, 2001
    Assignee: Camco International Inc.
    Inventor: Jeffery E. Daly
  • Patent number: 6138778
    Abstract: The present invention is a low differential pressure relief valve made up of a valve body and an elastic membrane for downhole tools, especially rolling cutter drill bits. An aperture is formed in the membrane and a valve body with protruding end stops is mounted in the aperture. The thickness and shape of the valve body are such that the aperture is stretched when assembled. The amount the membrane is stretched and the geometry of the protruding end stop, control the differential relief pressure. The valve body and each end stop can be designed so that the pressure relief setting will be different, depending upon which side of the membrane has the higher pressure. The relief device may be adapted to be integral with existing elastic membrane type lubricant pressure compensation devices for downhole tools.
    Type: Grant
    Filed: August 20, 1999
    Date of Patent: October 31, 2000
    Assignee: Camco International Inc.
    Inventors: Randall Ray Price, Walter Scott Dillard
  • Patent number: 6116357
    Abstract: A drill bit for boring a bore hole in an earthen formation comprises: a bit body having a pin end, a cutting end and a longitudinal bit axis and including at least two legs extending from the cutting end, each of the legs including a bearing that rotatably supports a cutter cone. The bit body further includes a fluid flow system, including a flowway in said pin end that is in fluid communication with at least one exit port in the cutting end, the exit port being defined by a nozzle boss and disposed adjacent one of the legs. Each of the legs includes a leading side surface, a trailing side surface, and a center panel, and at least one of said legs is asymmetric such that its trailing side surface is larger than its leading side surface. The present bit can also include a lubricant system that has its opening in the trailing side of the leg, and can further include various wear resistant coatings and inserts on its surface.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: September 12, 2000
    Assignee: Smith International, Inc.
    Inventors: Robert Wagoner, Roger Didericksen, William M. Conn, Peter Thomas Cariveau
  • Patent number: 6092611
    Abstract: A relief valve for use in roller cone drilling bits of the sealed bearing type and other types of sealed fluid systems. The relief valve includes a valve body arranged to fit into the lubricating system of the bit and an elastomeric valve member having a flow port therein that is normally closed. The valve member includes a flexible lip defining the port that is arranged to permit flow in one direction through the port to relieve pressure above a predetermined value while preventing flow therethrough in the opposite direction.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: July 25, 2000
    Assignee: Dresser Industries, Inc.
    Inventor: William C. Saxman