With Bearing Or Seal Details Patents (Class 175/371)
  • Publication number: 20130133955
    Abstract: A drill bit can include a seal which seals against a drill bit surface, the seal including a matrix seal material and a plurality of hollow spheres in the matrix seal material. Another drill bit can include a seal with a matrix seal material, spheres being more dense in a portion of the matrix seal material as compared to in the matrix seal material outside of the portion, and the portion of the matrix seal material being in dynamic sealing contact with a drill bit surface during operation. A drill bit can include a seal between a cone and a journal, the seal comprising a matrix seal material and a plurality of spheres in the matrix seal material, the matrix seal material comprising nitrile.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 30, 2013
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Halliburton Energy Services, Inc.
  • Patent number: 8448723
    Abstract: A drill bit includes a floating journal bushing, a seal, a cutter having a seal gland for the seal and a cutter bearing surface proximate to the journal bearing, wherein the cutter bearing surface has a first inner diameter, and a journal, wherein the cutter is rotatably coupled about the journal, wherein the journal bearing is rotatably coupled about the journal, wherein the journal has a seal boss having a first diameter, and a journal bearing surface having a second diameter, and wherein the first diameter is less than the first inner diameter.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: May 28, 2013
    Assignee: Burintekh USA, LLC
    Inventors: Micheal Burl Crawford, Pele Jason Nunley, Richard August Flak
  • Patent number: 8443919
    Abstract: A drill tool includes a bit body, at least one bearing shaft extending from the bit body, and a cone mounted for rotation on the bearing shaft. A first sealing system includes a first annular seal gland formed in a cylindrical surface of the cone and a seal ring retained within the first annular seal gland and compressed against a cylindrical surface of the bearing shaft. A second sealing system includes a second annular seal gland formed in a radial surface of the cone and a Belleville spring retained within the second annular seal gland and compressed against a radial surface surrounding the bearing shaft. A set of non-pressure compensated lubrication channels are configured to supply lubricant to an interstitial volume defined between the cone and bearing shaft, the lubricant retained within the interstitial volume by the first and second sealing systems, the lubrication channels further supporting open air circulation through the bearing when the sealing systems fail and lubricant is lost.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: May 21, 2013
    Assignee: Varel International, Ind., L.P.
    Inventor: Miguel Angel Ramirez Santiago
  • Patent number: 8439134
    Abstract: A rotating cone drill bit includes a plurality of mud nozzles extending from the bit body, which are thermally fitted by controlling the temperature differential depending on the corresponding materials, the amount of fit desired, and the diameters of the elements to be fitted and which provide substantially obstruction-free mud paths toward the wellbore bottom. The bit has a plurality of reduced diameter cutter assemblies, each having a journal projecting from a corresponding leg. The journal has at least two cylindrical bearing surfaces and an annular groove formed therebetween and a spindle. An annular retention segment is rotatably mounted in the groove. The retention segment has an outer radial surface engaging a portion of one of the bearing surfaces of the cone, and an energy beam welding area fusing substantially the entire engaging surfaces of the retention segment and the cone.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: May 14, 2013
    Inventor: Edward Vezirian
  • Patent number: 8403079
    Abstract: A drill bit includes a bit head and a rotating bit cone. A sealing system for the drill bit includes a seal gland and a seal retained within the seal gland. The seal gland is defined by a radial cone surface, a head sealing surface and an opposed cone sealing surface. At least one of the head sealing surface and opposed cone sealing surface is not cylindrical (i.e., the surface is conical and not parallel to an axis of rotation for the cone). Additionally, the radial cone surface may be conical (i.e., the surface does not extend perpendicular to the axis of rotation of the cone). The seal is radially compressed between the head sealing surface and the opposed cone sealing surface. The use of one or more conical surfaces in the gland is provided to bias the compressed seal into a preferred dynamic sealing zone.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: March 26, 2013
    Assignee: Varel International, Ind., L.P.
    Inventors: Thomas Gallifet, David Michel Harrington
  • Patent number: 8393418
    Abstract: A drill bit includes a bit head and a rotating bit cone. A sealing system for the drill bit includes a seal gland and a seal retained within the seal gland. The seal gland is defined by a radial cone surface, a head sealing surface and an opposed cone sealing surface. At least one of the head sealing surface and opposed cone sealing surface is not cylindrical (i.e., the surface is conical and not parallel to an axis of rotation for the cone). Additionally, the radial cone surface may be conical (i.e., the surface does not extend perpendicular to the axis of rotation of the cone). The seal is radially compressed between the head sealing surface and the opposed cone sealing surface. The use of one or more conical surfaces in the gland is provided to bias the compressed seal into a preferred dynamic sealing zone.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: March 12, 2013
    Assignee: Varel International, Ind., L.P.
    Inventors: Thomas Gallifet, David Michel Harrington
  • 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
  • Publication number: 20130020135
    Abstract: A drill tool includes a cone mounted for rotation on a bearing shaft that extends from a bit head. The cone has a first planar base surface opposed to a second planar base surface of the bit head. A first annular groove is formed in the first planar base surface, and a second annular groove is formed in the second planar base surface. The first and second annular grooves are at least partially aligned with each other. The combination of the first and second annular grooves form a first annular gland. A protector ring is inserted into the first annular gland, and functions to divide a fluid path between the bearing shaft of the drill tool and an external environment into a plurality of parallel fluid paths that pass around the protector ring. Each parallel fluid path includes a convolution defined by a plurality of fluid direction changing corners.
    Type: Application
    Filed: July 18, 2011
    Publication date: January 24, 2013
    Applicant: Varel International, Ind., L.P.
    Inventor: Thomas Gallifet
  • Patent number: 8347683
    Abstract: Surface texturing is employed to modify the topography of one or more surfaces (radial or cylindrical) of the sealing system for a roller cone rock bit. The surface texturing results in a dimpled surface which retains additional lubricant helpful in reducing friction in the boundary and mixed lubrication regimes. Shot peening is disclosed as one method for texturing the desired surface.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: January 8, 2013
    Assignee: Varel International Ind., L.P.
    Inventor: Xiaobin Lu
  • Patent number: 8337085
    Abstract: A thrust bearing system for a roller cone rock bit includes at least one roller cone disposed on a leg having an air channel therethrough, the thrust bearing system including a primary thrust bearing surface on the leg configured to contact a corresponding primary bearing surface on the roller cone, wherein the primary thrust bearing surface on the leg includes at least one air circulation port in fluid communication with the air channel.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: December 25, 2012
    Assignee: Sandvik Intellectual Property AB
    Inventors: Mahavir Nagaraj, Jeremy Marcus, Vincent Wayne Shotton, Sameer Bhoite
  • Publication number: 20120312602
    Abstract: A composite journal seal for use in a roller cone drill bit may include a substantially ring shaped elastomeric body having at least two axial, radial, or canted sealing surfaces, at least one of the at least two axial, radial, or canted sealing surface being a dynamic sealing surface, and at least one reinforcement layer embedded at least 0.005 inches from the at least one dynamic sealing surface.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 13, 2012
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Ming Zhang, Qingxiu Li, Zhou Yong
  • Publication number: 20120298424
    Abstract: A rotating cone drill bit includes a plurality of mud nozzles extending from the bit body, which are thermally fitted by controlling the temperature differential depending on the corresponding materials, the amount of fit desired, and the diameters of the elements to be fitted and which provide substantially obstruction-free mud paths toward the wellbore bottom. The bit has a plurality of reduced diameter cutter assemblies, each having a journal projecting from a corresponding leg. The journal has at least two cylindrical bearing surfaces and an annular groove formed therebetween and a spindle. An annular retention segment is rotatably mounted in the groove. The retention segment has an outer radial surface engaging a portion of one of the bearing surfaces of the cone, and an energy beam welding area fusing substantially the entire engaging surfaces of the retention segment and the cone.
    Type: Application
    Filed: May 31, 2012
    Publication date: November 29, 2012
    Inventor: Edward Vezirian
  • Publication number: 20120285748
    Abstract: A bearing assembly for use in an apparatus having a housing and a shaft which is rotatably connected with the housing. A shaft extension extends from the interior of the housing at a first housing end. The shaft extension defines a first bearing shaft surface. The bearing assembly includes a first thrust bearing for transferring a first axial load between the shaft and the housing. The first thrust bearing is located axially between the first housing end and the first bearing shaft surface.
    Type: Application
    Filed: January 28, 2010
    Publication date: November 15, 2012
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Kennedy J. Kirkhope
  • Publication number: 20120228035
    Abstract: A drilling apparatus including a housing, a drill bit having a head end, a connection end, and a bearing mandrel between the head end and the connection end, a bearing pack associated with the bearing mandrel and the housing for transmitting forces between the drill bit and the housing, the bearing pack including at least one bearing interposed between the bearing mandrel and the housing, and a drive mechanism connected with the connection end of the drill bit, for driving the drill bit.
    Type: Application
    Filed: February 24, 2012
    Publication date: September 13, 2012
    Applicant: DRILFORMANCE TECHNOLOGIES, LLC
    Inventor: Sean GILLIS
  • Publication number: 20120160561
    Abstract: A drill tool includes a bit body, at least one bearing shaft extending from the bit body, and a cone mounted for rotation on the bearing shaft. A first sealing system includes a first annular seal gland formed in a cylindrical surface of the cone and a seal ring retained within the first annular seal gland and compressed against a cylindrical surface of the bearing shaft. A second sealing system includes a second annular seal gland formed in a radial surface of the cone and a Belleville spring retained within the second annular seal gland and compressed against a radial surface surrounding the bearing shaft. A set of non-pressure compensated lubrication channels are configured to supply lubricant to an interstitial volume defined between the cone and bearing shaft, the lubricant retained within the interstitial volume by the first and second sealing systems, the lubrication channels further supporting open air circulation through the bearing when the sealing systems fail and lubricant is lost.
    Type: Application
    Filed: December 22, 2010
    Publication date: June 28, 2012
    Applicant: Varel International
    Inventor: Miguel Angel Ramirez Santiago
  • Publication number: 20120160572
    Abstract: A seal ring assembly for a well drilling tool that takes the place of conventional O-rings that are prone to costly downhole failures. In a first embodiment the seal ring assembly is configured with a convex adapter seal ring at one end, a concave adapter seal ring at the other end, and a number of V-shaped component seal rings packed in between the convex and concave adapter seal rings and positioned in the space between a drill collar mandrel and a pressure cylinder of the well drilling tool. In a second embodiment the seal ring assembly is configured with a number of X-shaped component seal rings, each of which is fitted with two O-rings. The seal ring assemblies are able to flex when operating in a bent drill hole so as to maintain seal integrity and prevent fluids from passing through to the electronics region of the well drilling tool.
    Type: Application
    Filed: December 22, 2010
    Publication date: June 28, 2012
    Applicant: SONDEX LIMITED
    Inventors: David Blaine AYERS, Ashwin GUPTE
  • Patent number: 8201646
    Abstract: A rotating cone drill bit includes a plurality of mud nozzles extending from the bit body, which are thermally fitted by controlling the temperature differential of 300° F.-900° F. depending on the corresponding materials of the elements to be fitted, the amount of fit desired, and the diameters of the elements to be fitted and which provide substantially obstruction-free mud paths toward the wellbore bottom. The bit has a plurality of reduced diameter cutter assemblies, each having a journal projecting from a corresponding leg. The journal has at least two cylindrical bearing surfaces and an annular groove formed therebetween and a spindle. An annular retention segment is rotatably mounted in the groove. The retention segment has an outer radial surface engaging a portion of one of the bearing surfaces of the cone, and an energy beam welding area fusing substantially the entire engaging surfaces of the retention segment and the cone.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: June 19, 2012
    Inventor: Edward Vezirian
  • Patent number: 8196682
    Abstract: A roller cone bit is provided that includes a wear resistant coating applied to a bearing shaft, which is attached to a roller cone. The wear resistant coating can be a tungsten/tungsten carbide composite applied by chemical vapor deposition.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: June 12, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Aaron J. Dick, Chih Lin
  • Publication number: 20120111639
    Abstract: Systems and methods are provided for swellable material activation and monitoring in a subterranean well. A sensor system for use in a subterranean well includes a swellable material, and at least one sensor which is displaced to a wellbore surface in response to swelling of the swellable material. Another sensor system includes a sensor which detects swelling of a swellable material. A swellable well tool system includes a base pipe, a swellable material on an exterior of the base pipe, and eccentric weighting for inducing rotation of the swellable material about a longitudinal axis of the base pipe.
    Type: Application
    Filed: July 12, 2010
    Publication date: May 10, 2012
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Seth G. Anderle, Ping C. Sui, Mark E. Williams, Guy Lefort
  • Publication number: 20120080230
    Abstract: Bearings for downhole tools including a first bearing member and a second bearing member, at least one of the first and second bearing members having a channel formed therein. Methods of cooling bearings of downhole tools comprise flowing a fluid within a channel formed in at least one bearing member. Heat is transferred from at least the at least one bearing member to the fluid. The fluid is flowed away from the at least one bearing member.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 5, 2012
    Applicants: ELEMENT SIX LIMITED, BAKER HUGHES INCORPORATED
    Inventors: Alejandro Flores, Aaron J. Dick, Chih Lin, John F. Bradford, Louise F. van Staden, Gregory B. Swanepoel, Clement D. van der Riet, Siu-Wah Wai, Dragan Vukovic, Klaus Tank
  • Publication number: 20120024608
    Abstract: Surface texturing is employed to modify the topography of one or more surfaces (radial or cylindrical) of the sealing system for a roller cone rock bit. The surface texturing produces a regular or repeated patterned dimpled surface which retains additional lubricant helpful in reducing friction in the boundary and mixed lubrication regimes.
    Type: Application
    Filed: July 28, 2010
    Publication date: February 2, 2012
    Applicant: Varel International, Ind., L.P.
    Inventor: Xiaobin Lu
  • Publication number: 20110315453
    Abstract: A drill bit includes a floating journal bushing, a seal, a cutter having a seal gland for the seal and a cutter bearing surface proximate to the journal bearing, wherein the cutter bearing surface has a first inner diameter, and a journal, wherein the cutter is rotatably coupled about the journal, wherein the journal bearing is rotatably coupled about the journal, wherein the journal has a seal boss having a first diameter, and a journal bearing surface having a second diameter, and wherein the first diameter is less than the first inner diameter.
    Type: Application
    Filed: August 2, 2007
    Publication date: December 29, 2011
    Applicant: ULTERRA DRILLING TECHNOLOGY, L.P.
    Inventors: Michael Burle Crawford, Pele Jason Nunley, Richard August Flak
  • Publication number: 20110297448
    Abstract: A drill tool includes a bit body, at least one bearing shaft extending from the bit body and a cone mounted for rotation on the bearing shaft. A mechanical seal is disposed between the bearing shaft and the cone in a seal gland. The mechanical seal includes a rigid seal ring having a dynamic sealing surface with the cone and another non-sealing surface exposed to an aperture in the seal gland. The mechanical seal further includes at least one cooling channel formed in the another non-sealing surface of the rigid seal ring, the cooling channel having an open end in fluid communication with the aperture in the seal gland.
    Type: Application
    Filed: March 11, 2011
    Publication date: December 8, 2011
    Applicant: VAREL INTERNATIONAL, IND., L.P.
    Inventor: Xiaobin Lu
  • Patent number: 8020638
    Abstract: A seal assembly for sealing between a journal shaft and a rotating cone cutter of a drill bit. In an embodiment, the seal assembly comprises a seal gland positioned between the journal shaft and the cone cutter. In addition, the seal assembly comprises an annular seal body disposed about the journal shaft within an annular recess. The seal body comprises a dynamic sealing surface at its outer diameter D1 that forms a dynamic seal with the sealing surface of the recess and a static sealing surface at its inner diameter D2 that forms a static seal with an outer bearing surface of the journal shaft.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: September 20, 2011
    Assignee: Smith International, Inc.
    Inventors: Sudarsanam Chellappa, Zhou Yong
  • Publication number: 20110220422
    Abstract: A rotary cutter mount for an earth-boring cutter is provided which includes a ball bearing journal [100] adapted to be coupled to a cutter body [210], having a minimum [110] and a maximum [120] cylindrical diameter, and a first [115] and second [116] mounting ends. The maximum diameter [120] defines a journal body [122] which includes an exterior surface adapted to be rotationally coupled to the interior surface of the cutter body [210] so as to allow the cutter body [210] to rotate freely with respect to the bearing journal [110]. The minimum [110] diameter defines a shaft portion having sealing surfaces. The first [115] and a second [116] mounting ends are shaped to enable a rotationally fixed positioning of the bearing journal [100] in a yoke of a corresponding cutter head-plate support bracket. A row of ball-bearing races [126] is recessed to extend circumferentially about the exterior surface of the journal body [122].
    Type: Application
    Filed: September 16, 2008
    Publication date: September 15, 2011
    Inventor: Stu Blattner
  • Publication number: 20110220423
    Abstract: This invention relates to a tri-cone bit for high RPM drilling applications, which comprises three head sections and three cones. Cutting elements are arranged on each cone. Upper parts of the three head sections are joined together to form a bit body, on which nozzle sockets are provided, and nozzles are installed in bores of the nozzle sockets. A bearing between the cones and the head sections is a composite roller-journal bearing which is formed by rollers and arc-shaped slides arranged in an alternating way, and a seal means for the bearing is of metal face type. The composite roller-journal bearing of the invention can withstand high RPM and high load, and also has a higher resistance to impact, thereby ensuring longer working life of the bearing under high RPM and medium-high WOB. The six-point gage protection structure enhances stability of the bit and reduces cutting element breakage caused by bit vibration.
    Type: Application
    Filed: March 9, 2011
    Publication date: September 15, 2011
    Applicant: KINGDREAM PUBLIC LTD. CO.
    Inventors: Hongping Tian, Zengyuan Shao, Xiaobing Fan
  • Publication number: 20110214920
    Abstract: Methods and apparatus are described to drill and complete wellbores. Such wellbores include extended reach horizontal wellbores, for example in shales, deep subsea extended reach wellbores, and multilateral wellbores. Specifically, the invention provides simple threaded subassemblies that are added to existing threaded tubular drilling and completion equipment which are used to dramatically increase the lateral reach using that existing on-site equipment. These subassemblies extract power from downward flowing clean mud, or other fluids, in an annulus to provide additional force or torque on tubular elements within the wellbore, while maintaining circulation, to extend the lateral reach of the drilling equipment and completion equipment. These added elements include combinations of The Leaky Seal™, a Cross-Over, The Force Sub™ and The Torque Sub™. The use of such additional simple elements allow lighter drilling equipment to be used to reach a given lateral distance, therefore reducing drilling costs.
    Type: Application
    Filed: May 2, 2011
    Publication date: September 8, 2011
    Inventors: William Banning Vail, III, Robert L. Dekle, Damir S. Skerl, James E. Chitwood
  • Patent number: 7992657
    Abstract: An earth bit includes a cutting cone rotatably mounted to a lug with a journal. A sealing member is sealingly engaged with the cutting cone and a wear ring carried by the lug. The wear ring is dynamically engaged with the first sealing member and statically engaged with the lug.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: August 9, 2011
    Assignee: Atlas Copco Secoroc LLC
    Inventor: Gregory W. Peterson
  • Publication number: 20110174547
    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: Application
    Filed: December 9, 2010
    Publication date: July 21, 2011
    Applicant: US SYNTHETIC CORPORATION
    Inventors: Timothy N. Sexton, Craig H. Cooley
  • Publication number: 20110168450
    Abstract: A method of reducing contact pressure between bearing surfaces of a drill bit can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A drill bit can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces has a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition.
    Type: Application
    Filed: January 12, 2010
    Publication date: July 14, 2011
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Ping C. SUI, Gary E. WEAVER
  • Publication number: 20110079444
    Abstract: A hybrid-type earth boring drill bit is described having fixed cutting blades and rolling cones with cutting elements, wherein the rolling cones are associated with a spindle assembly that may be optionally divorced from the head pin assembly, and which includes bearing members that further include a plurality of polycrystalline diamond elements.
    Type: Application
    Filed: September 16, 2010
    Publication date: April 7, 2011
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Ajay V. Kulkarni
  • Publication number: 20110061940
    Abstract: A rock drilling bit having PDC radial bearings has journal and cone bearing surfaces with increased contact area to increase load support. The radius of curvature of the bearing pin journal and cone bearing surfaces are matched or conformed on the bearing pressure side. The conformal journal surfaces may be formed on the main journal bearing, the pilot pin radial bearing, or both surfaces. In addition, diamond inlays may be located on the bearing surfaces of the cone, the bearing pin, or both components.
    Type: Application
    Filed: November 17, 2010
    Publication date: March 17, 2011
    Applicants: Baker Hughes Incorporated, US Synthetic Corporation
    Inventors: Aaron J. Dick, Chih Lin, Terry J. Koltermann, Anton F. Zahradnik, Dan E. Scott, Don Q. Nguyen, Eric Sullivan, Scott Shiqiang Shu, Craig Hodges Cooley, Timothy Nathan Sexton
  • Publication number: 20110048810
    Abstract: The present invention relates to a method and apparatus for forming a dynamic seal between two surfaces. More specifically, the invention relates to creating a textured surface with a thin, hard coating on a metallic annular sealing ring such as the sealing ring used in an earth boring drill bit.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 3, 2011
    Applicant: Baker Hughes Incorporated
    Inventors: Chih Lin, Aaron J. Dick
  • Patent number: 7896109
    Abstract: A roller cone bit is provided that includes a companion ring positioned adjacent to the seal, wherein the companion ring is formed of a porous material that is compatible with the fluid lubricating the interface between the roller cone and the bearing pin.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: March 1, 2011
    Assignee: Baker Hughes Incorporated
    Inventor: Chih Lin
  • Publication number: 20110024198
    Abstract: Downhole tool bearings are provided with diamond enhanced materials. The diamond enhanced materials comprise diamond grains in a matrix of tungsten or silicon carbide or a silicon bonded diamond material. A brazed diamond grit or diamond particles coated with a reactive braze may be utilized for bearing applications. Bearing rings for use in downhole tools may be formed at least in part with the diamond enhanced material. In one embodiment, the bearing rings may be used in a positive displacement motor. In additional embodiments, the bearing rings may be used in a submersible pump.
    Type: Application
    Filed: October 11, 2010
    Publication date: February 3, 2011
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Aaron J. Dick, David A. Curry, Terry J. Koltermann, Chih Lin, Danny E. Scott, Anton F. Zahradnik
  • Patent number: 7861805
    Abstract: A rock drilling bit having PDC radial bearings has journal and cone bearing surfaces with increased contact area to increase load support. The radius of curvature of the bearing pin journal and cone bearing surfaces are matched or conformed on the bearing pressure side. The conformal journal surfaces may be formed on the main journal bearing, the pilot pin radial bearing, or both surfaces. In addition, diamond inlays may be located on the bearing surfaces of the cone, the bearing pin, or both components.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: January 4, 2011
    Assignees: Baker Hughes Incorporated, US Synthetic Corporation
    Inventors: Aaron J. Dick, Chih Lin, Terry J. Kolterman, Anton F. Zahradnik, Dan E. Scott, Don Q. Nguyen, Eric Sullivan, Scott Shiqiang Shu, Craig Hodges Cooley, Timothy Nathan Sexton
  • Publication number: 20100320002
    Abstract: A rock bit includes a shaft and a cone mounted for rotation about the shaft at a journal bearing. A seal gland for the rock bit is defined at least by the shaft and the cone. A compressible seal ring is positioned within the seal gland. A thermal insulating ring is installed within the seal gland and positioned between the compressible seal ring itself and the journal bearing to insulate the compressible seal ring from heat radiating from the journal bearing.
    Type: Application
    Filed: August 27, 2010
    Publication date: December 23, 2010
    Applicant: VAREL INTERNATIONAL, IND., L.P.
    Inventor: Thomas Gallifet
  • Patent number: 7798254
    Abstract: An earth bit includes a cone rotatably mounted to a shaft with a hub unit and thrust roller bearings. The hub unit is moveable between mounted and unmounted positions on the shaft, as a single unit, in a repeatable manner. The hub unit includes a pair of roller bearings positioned between inner and outer races. The outer race includes a recess extending around its outer periphery. A sealing structure is slidingly engaged with the recess to provide a seal between the cone and shaft.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: September 21, 2010
    Assignees: Atlas Copco Secoroc LLC, SKF USA Inc.
    Inventors: Gregory W. Peterson, Anthony D. Podnieks, Tim Chu, Elisabeth Smith, Janice David
  • Patent number: 7798248
    Abstract: A roller cone bit is provided that includes a companion ring positioned exterior to a seal, wherein the companion ring includes a textured surface where the inner diameter of the companion ring contacts the bearing pin.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: September 21, 2010
    Assignee: Baker Hughes Incorporated
    Inventor: Bruce Stauffer
  • Publication number: 20100230172
    Abstract: An earth bit includes a cutting cone carried by a lug, and an interstice seal assembly which forms a dynamic seal with a radial interstice lug surface of the lug. The interstice seal assembly includes a rigid sealing ring having lengthened and shortened arm portions. The lengthened arm portion extends outwardly from the shortened arm portion, and engages the radial interstice lug surface.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 16, 2010
    Applicant: ATLAS COPCO SECOROC LLC
    Inventor: Gregory W. Peterson
  • Publication number: 20100193251
    Abstract: A sealing system is provided for a drill bit including a bit head and a rotating bit cone. The sealing system includes a seal gland and a seal retained within the seal gland. The seal gland is defined by a radial cone surface and is further defined by a head sealing surface and an opposed cone sealing surface. At least one of the head sealing surface and opposed cone sealing surface is not cylindrical (i.e., the surface is conical and not parallel to an axis of rotation for the cone). Additionally, the radial cone surface may be conical (i.e., the surface does not extend perpendicular to the axis of rotation of the cone). The seal is radially compressed between the head sealing surface and the opposed cone sealing surface. The use of one or more conical surfaces in the gland is provided to bias the compressed seal into a preferred dynamic sealing zone.
    Type: Application
    Filed: April 9, 2010
    Publication date: August 5, 2010
    Applicant: Varel International, Ind., L.P.
    Inventors: Thomas Gallifet, David Michel Harrington
  • Publication number: 20100163313
    Abstract: A drill bit bearing having a treated surface and method for preparing the same is provided. The method includes the steps of polishing at least one contacting surface of the bearing with an abrasive paste to a finish of less than about 10 ?in Ra. The surface of the polishing instrument has a coating that includes a mixture of an epoxy cement and a polymer.
    Type: Application
    Filed: December 28, 2009
    Publication date: July 1, 2010
    Applicant: Baker Hughes Incorporated
    Inventors: Chih Lin, Aaron Dick
  • Publication number: 20100147595
    Abstract: A high aspect ratio seal is provided for large roller cone drill bit having a diameter of greater than about 12¼ inches wherein the contact width is narrowed, relative to the width of the seal, to provide a desired contact width.
    Type: Application
    Filed: December 12, 2008
    Publication date: June 17, 2010
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Anton F. Zahradnik, Don Q. Nguyen, Ron D. McCornick, Terry J. Koltermann, Michael J. Veasey, Aaron J. Dick
  • Patent number: 7735583
    Abstract: A roller cone bit having an elastomeric seal with a self break-in property is disclosed. The elastomeric seal includes abrasive material on a sliding surface for facilitating break-in. Examples of abrasive materials include ground rock, hard metals, tungsten, tungsten carbide, tantalum, tantalum carbide, titanium carbide, titanium nitride, and minerals, diamonds and nanomaterial enhanced diamond.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: June 15, 2010
    Assignee: Baker Hughes Incorporated
    Inventor: Chih Lin
  • Patent number: 7721827
    Abstract: A drill bit includes a bit head and a rotating bit cone. A sealing system for the drill bit includes a seal gland and a seal retained within the seal gland. The seal gland is defined by a radial cone surface, a head sealing surface and an opposed cone sealing surface. At least one of the head sealing surface and opposed cone sealing surface is not cylindrical (i.e., the surface is conical and not parallel to an axis of rotation for the cone). Additionally, the radial cone surface may be conical (i.e., the surface does not extend perpendicular to the axis of rotation of the cone). The seal is radially compressed between the head sealing surface and the opposed cone sealing surface. The use of one or more conical surfaces in the gland is provided to bias the compressed seal into a preferred dynamic sealing zone.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: May 25, 2010
    Assignee: Varel International Ind., L.P.
    Inventors: Thomas Gallifet, David Michael Harrington
  • Patent number: 7708090
    Abstract: An elastomeric seal ring is located between each bearing pin and each cone of an earth-boring bit. An excluder ring or band is imbedded within the inner diameter of the seal ring. A portion of the inner diameter of the seal ring as well as the excluder ring are in dynamic sealing contact with the bearing pin. The excluder ring may be harder and more wear resistant than the seal ring. The excluder ring may have lubricating properties. An outer excluder ring may be located on the outer diameter of the seal ring for engaging the cone to resist rotation.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: May 4, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Anton Zahradnik, Gregory L. Ricks, Gregory W. Peterson, Don Quy Nguyen, Chih C. Lin, Terry J. Koltermann
  • Publication number: 20100089657
    Abstract: A roller cone bit is provided that includes a companion ring positioned adjacent to the seal, wherein the companion ring is formed of a porous material that is compatible with the fluid lubricating the interface between the roller cone and the bearing pin.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 15, 2010
    Applicant: Baker Hughes, Inc.
    Inventor: Chih Lin
  • Patent number: 7694754
    Abstract: An earth boring bit has a bit body having a depending bearing pin. A cone has a cavity rotatably mounted on the bearing pin. A seal groove is formed in the cavity of the cone. An elastomeric seal ring is located within the groove and forms a seal between a base of the groove and the bearing pin. The seal ring has two side surfaces, each spaced from one of the side walls of the groove by a clearance. Elastomeric protuberances protrude from each of the side surfaces of the seal ring for non-sealing contact with one of the side walls of the groove.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: April 13, 2010
    Assignee: Baker Hughes Incorporated
    Inventor: Aaron J. Dick
  • Patent number: 7690138
    Abstract: In one aspect of the invention a trenching machine for degrading natural and man-made formations, comprising a plurality of roller assemblies exteriorly mounted to a trenching boom or wheel. The rollers comprising a plurality of pointed inserts radially arranged along the wheel's outer diameter. The inserts are adapted to degrade the formation when the boom or wheel is activated.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: April 6, 2010
    Inventors: David R. Hall, Francis Leany, Ronald Crockett, Jeff Jepson, Tyson J. Wilde
  • Publication number: 20100071960
    Abstract: A composite seal gland insert for a roller cone rock bit is a polymer composite sleeve containing one or more constituents that function to significantly lower the wear of the elastomeric seal ring. A fluid lubricant film also may be used between the elastomer seal and the gland. The outer surface of the insert is profiled to provide a sealing surface against which the elastomer seal runs. The insert is installed over the bearing pin and has a surface that engages the last machined surface of the leg. A static seal, which may comprise an additional elastomeric seal, may be used beneath the gland insert to provide a pressure seal between the insert and the pin. An adhesive also may be used as the pressure seal and also to retain the gland insert in the desired position. In addition, a mechanical anti-rotation device may be used to prevent rotation of the gland insert.
    Type: Application
    Filed: September 24, 2009
    Publication date: March 25, 2010
    Applicant: Baker Hughes Incorporated
    Inventors: David A. Curry, Terry J. Koltermann, Chih C. Lin, Stuart Hall