Rolling Cutter Bit Or Rolling Cutter Bit Element Patents (Class 175/331)
  • Patent number: 9745801
    Abstract: A rotary drill bit is disclosed. The rotary drill bit may include a bit body, a cutting pocket defined in the bit body, and a cutting element rotatably coupled to the bit body. The cutting element may be positioned at least partially within the cutting pocket. The rotary drill bit may also include a rotation-inducing member adjacent to the cutting element for inducing rotation of the cutting element relative to the cutting pocket. The rotation-inducing member may include a resilient member or a vibrational member. The rotary drill bit may also include protrusions extending from an interior of the cutting pocket adjacent to an outer diameter of the cutting element. A method of drilling a formation is also disclosed.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: August 29, 2017
    Assignee: US Synthetic Corporation
    Inventors: Craig H. Cooley, Jeffrey B. Lund, Jair J. Gonzalez
  • Patent number: 9145739
    Abstract: A cutting tool includes a tool body having a longitudinal axis and a cutting face, a plurality of blades spaced azimuthally about the cutting face and extending at least laterally through a gage region, and a plurality of cutters disposed along the blades. At least two different types of back reaming elements may be disposed on a transitional surface between the gage region of at least one blade and a connection end of the cutting tool. Alternatively, at least one back reaming element may be disposed on a transitional surface between the gage region of at least one blade and a connection end of the cutting tool, and a wear resistant material provided on or in the transitional surface.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: September 29, 2015
    Assignee: Smith International, Inc.
    Inventors: Carl Hoffmaster, Shelton W Alsup, Michael G. Azar, Thomas W. Oldham, Stuart R. Oliver, Sidney J. Isnor
  • Patent number: 9016409
    Abstract: A cutting tool cutting tool may include a tool body having a plurality of blades extending radially therefrom; and a plurality of rotatable cutting elements mounted on at least one of the plurality of blades, wherein the plurality of rotatable cutting elements are mounted on the at least one blade in a nose and/or shoulder region of the cutting tool at a side rake angle ranging from about 10 to about 30 degrees or ?10 to about ?30 degrees.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: April 28, 2015
    Assignee: Smith International, Inc.
    Inventors: Youhe Zhang, Michael G. Azar
  • Patent number: 9016407
    Abstract: A drill bit for drilling a borehole in earthen formations comprises a bit body including a cone region, a shoulder region, and a gage region. In addition the bit comprises a first primary blade and a second primary blade. Further, the bit comprises a plurality of primary cutter elements mounted to the first primary blade in different radial positions. Still further, the bit comprises a plurality of primary cutter elements mounted to the second primary blade in different radial positions. Moreover, a first primary cutter element of the plurality of primary cutter elements on the first primary blade and a first primary cutter element of the plurality of primary cutter elements on the second primary blade are each positioned in the cone region and are redundant. The shoulder region has a total cutter redundancy percentage that is less than a total cutter redundancy percentage in the cone region.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: April 28, 2015
    Assignee: Smith International, Inc.
    Inventors: Bala Durairajan, Carl M. Hoffmaster, Michael G. Azar
  • Publication number: 20150090501
    Abstract: A roller cutter drill bit with mixed bearing types includes a bit body with at least one journal facet and a cavity facet. A cavity extends into the bit body from the cavity facet. The bit body is configured to rotate about a bit axis during drilling. A journal extends outward from the at least one journal facet. A first rotatable cutter that supports a first plurality of cutting structures has a journal portion received by the cavity. A second rotatable cutter that supports a second plurality of cutting structures has a cavity portion that is receives the journal.
    Type: Application
    Filed: September 25, 2014
    Publication date: April 2, 2015
    Applicant: VAREL INTERNATIONAL IND., L.P.
    Inventor: William W. King
  • Patent number: 8991523
    Abstract: A drill bit includes a bit body, a plurality of blades extending radially from the bit body, a plurality of cutter pockets disposed on the plurality of blades, at least one rolling cutter disposed in one of the cutter pockets, wherein each rolling cutter has a substrate, a cutting face, a cutting edge, and a side surface, and at least one blocker positioned adjacent to each of the at least one rolling cutters on a leading face of the blade, wherein each blocker has a retention end and an attachment end. The retention end of each blocker is positioned adjacent to a portion of the cutting face of each rolling cutter to retain the rolling cutter in the cutter pocket and the attachment end is attached to a portion of the blade.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: March 31, 2015
    Assignee: Smith International, Inc.
    Inventors: Yuelin Shen, Youhe Zhang, Yuri Burhan, Michael A. Siracki, Mahavir Nagaraj, Bala Durairajan, Scott D. McDonough, Peter Thomas Cariveau
  • Patent number: 8969754
    Abstract: Methods for depositing hardfacing material on portions of drill bits comprise providing a vertically oriented plasma transfer arc torch secured to a positioner having controllable movement in a substantially vertical plane. A rolling cutter is secured to a chuck mounted on an articulated arm of a robot. A surface of a tooth of the rolling cutter is positioned in a substantially perpendicular relationship beneath the torch. The torch is oscillated along a substantially horizontal axis. The rolling cutter is moved with the articulated arm of the robot in a plane beneath the oscillating torch. A hardfacing material is deposited on the tooth of the rolling cutter.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: March 3, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: David Keith Luce, Kenneth E. Gilmore, Alan J. Massey, Timothy P. Uno, Keith L. Nehring
  • Publication number: 20150053422
    Abstract: A hybrid rotary cone drill bit includes a plurality of legs. A bearing shaft extends from each leg, and a rotary cone is rotationally coupled to each bearing shaft. At least one rotary cone includes a nose row of cutting structures, an inner row of cutting structures, and a gage row of cutting structures. The nose row and the inner row of cutting structures are formed of milled teeth. The gage row of cutting structures is formed of cutter inserts.
    Type: Application
    Filed: August 23, 2013
    Publication date: February 26, 2015
    Applicant: VAREL INTERNATIONAL IND., L.P.
    Inventors: Kyle Nobile, Matt Stroever, David Michel Harrington, Karl W. Rose
  • Patent number: 8955734
    Abstract: A roller cone drill bit includes a bit body, at least one leg extending downward from the bit body, a journal on each leg, and a roller cone mounted on each journal. A ball race is configured between each journal and roller cone, and a plurality of retention balls is disposed within each ball race. A ball hole extends from the back face of each leg to the ball race, and a ball hole plug fits within the ball hole. The ball hole plug is secured to the leg by a friction stir weld.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: February 17, 2015
    Assignee: Smith International, Inc.
    Inventors: Russell J. Steel, Scott M. Packer, Cary A. Roth, Madapusi K. Keshavan
  • Patent number: 8950514
    Abstract: Drill bits with at least two roller cones of different diameters and/or utilizing different cutter pitches in order to reduce bit tracking during drilling operations are described. In particular, earth boring drill bits are provided, the bits having two or more roller cones, and optionally one or more cutter blades, the bits being arranged for reducing tracking by the roller cone teeth during operation by adjusting the teeth spacing, cone pitch angle, and/or the diameter of one or more of the cones. These configurations enable anti-tracking behavior and enhanced drilling efficiency during bit operation.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: February 10, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Robert J. Buske, John F. Bradford
  • Patent number: 8925654
    Abstract: A fixed-cutter earth-boring tool includes a first blade carrying a first plurality of cutting elements and having a first stiffness and a second blade configured to have a second stiffness different from the first stiffness. A method of forming an earth-boring tool includes forming a bit body having a plurality of blades, and providing at least one cutting element on at least one of the plurality of blades. At least one blade of the plurality has a stiffness different from a stiffness of another blade of the plurality. A fixed-cutter earth-boring drill bit includes a first blade having a first aggressiveness, and at least one additional blade having a second aggressiveness.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: January 6, 2015
    Assignee: Baker Hughes Incorporated
    Inventor: Anton F. Zahradnik
  • Publication number: 20140353046
    Abstract: A drill bit includes a bit body having a longitudinal axis extending there through, a plurality of journals extending downward and radially outward from the bit body, each journal having a journal axis extending from a base of the journal through the length of the journal, wherein the journal axis at the base is at a first radial distance from the longitudinal axis, a roller cone rotatably mounted to each of the journals, and at least one blade protruding from the bit body and extending axially and radially along the bit body from a first end to a second end, wherein the first end is at a second radial distance from the longitudinal axis greater than the first radial distance, and wherein the second end is at a gage region of the drill bit.
    Type: Application
    Filed: May 23, 2014
    Publication date: December 4, 2014
    Applicant: Smith International, Inc.
    Inventors: Zhehua Zhang, Jiaqing Yu, Scott D. McDonough
  • Patent number: 8899357
    Abstract: Various downhole drilling tools designed and manufactured at least in part on evaluating respective forces acting on respective groups and sets of cutting elements during simulated engagement with the downhole end of a wellbore and drilling from a first downhole formation into a second downhole formation. Simulating forces acting on each cutting element as the cutting element contacts a downhole formation may be used to force balance downhole drilling tools during transition drilling or non-uniform downhole drilling conditions. Multilevel force balanced downhole drilling tools may be designed using five respective simulations, cutter group level, neighbor cutter group level, cutter set level, group of N (N=3 or N=4) consecutive cutters level and all cutters level. Various cutter layout procedures and algorithms may also be used to design multilevel force balanced downhole drilling tools which may drill faster with higher lateral stability, especially during downhole transiting drilling conditions.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: December 2, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Shilin Chen
  • Patent number: 8881849
    Abstract: A cutting tool having a tool body with a plurality of blades extending radially therefrom and a plurality of rotatable cutting elements mounted on at least one of the plurality of blades is disclosed, wherein the plurality of rotatable cutting elements are mounted on the at least one blade utilizing multiple side rake angles.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: November 11, 2014
    Assignee: Smith International, Inc.
    Inventors: Yuelin Shen, Youhe Zhang
  • Patent number: 8863864
    Abstract: A superabrasive compact (e.g., a polycrystalline diamond compact) including a substrate and at least one feature for reducing the susceptibility of the substrate to liquid metal embrittlement during brazing operations is disclosed. The superabrasive compact may include a region between the substrate and a superabrasive table in which residual tensile stresses are located. The at least one feature may be disposed proximate to the region between the substrate and the superabrasive table in which residual tensile stresses are located.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: October 21, 2014
    Assignee: US Synthetic Corporation
    Inventor: David P. Miess
  • Publication number: 20140216824
    Abstract: A drill head including a tool holder, chisel supports mounted thereon and drill bits. According to this invention, the chisel supports can be separated from the tool holder.
    Type: Application
    Filed: June 28, 2012
    Publication date: August 7, 2014
    Inventors: Karl Kammerer, Wolfgang Essig
  • Patent number: 8794356
    Abstract: Earth-boring tools include a body, one or more blades projecting outwardly from the body, and cutting elements carried by the blade. The cutting elements include at least one shearing cutting element and at least one gouging cutting element. Methods of forming an earth-boring tool include mounting a shearing cutting element comprising an at least substantially planar cutting face to a body of an earth-boring tool, and mounting a gouging cutting element comprising a non-planar cutting face to the body of the earth-boring tool. The gouging cutting element may be positioned on the body of the earth-boring tool such that the gouging cutting element will gouge formation material within a kerf cut in the formation material by the shearing cutting element, or between kerfs cut in the formation material by a plurality of shearing cutting elements.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: August 5, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Nicholas J. Lyons, Rudolf Carl Pessier, Danny E. Scott, David Gavia, Juan Miguel Bilen, Anthony A. DiGiovanni
  • Patent number: 8789623
    Abstract: The present disclosure relates to greases containing metal sulfonate thickeners. In one example the thickener may be a calcium sulfonate thickener. In other examples grease may contain a combination of a metal sulfonate thickener and another thickener, such as a metal complex soap grease, detergent, or non-soap thickener. The grease may be formulated to meet specific performance criteria relevant to lubrication of a roller cone drill bit in downhole conditions. The disclosure also relates to a roller cone drill bit containing a grease of the disclosure.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: July 29, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: David P. Duckworth, Ping C. Sui, Liwen Wei
  • Publication number: 20140196956
    Abstract: A drill bit may include a bit body, comprising: at its upper end, a connection adapted to connect to a drill string; at its lower end, a plurality of journals extending downwardly and radially outward from a longitudinal axis of the bit; a plurality of roller cones rotatable mounted on the plurality of journals; and at least three rows of cutting elements disposed on each of the plurality of roller cones, wherein an outermost row has an extension height to diameter ratio greater than a mid row, and the mid has an extension height to diameter ratio greater than an innermost row.
    Type: Application
    Filed: March 14, 2014
    Publication date: July 17, 2014
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Prabhakaran K. Centala, Zhehua Zhang
  • Publication number: 20140182937
    Abstract: A roller cone drill bit having a bit body. The bit body has a journal bearing coupled to an end portion thereof. A roller cone is coupled to the journal bearing. A first cutting element is coupled to the roller cone. A ratio of a radius of curvature of a crest portion of the first cutting element to a diameter of the first cutting element is between about 0.3:1 and about 0.8:1. A second cutting element is coupled to the roller cone. A ratio of a radius of curvature of a crest portion of the second cutting element to a diameter of the second cutting element is between about 0.05:1 and about 0.3:1. A height of the second cutting element is greater than the height of the first cutting element h between about 0.1 mm and about 6 mm.
    Type: Application
    Filed: December 10, 2013
    Publication date: July 3, 2014
    Applicant: Smith International, Inc.
    Inventors: Robert H. Slaughter, JR., Lokesh Bhatia, Angelo L. Spedale
  • Publication number: 20140144709
    Abstract: An insert for a rolling cone drill bit includes a base portion having a central axis. The base portion is configured to be seated in a mating socket in a cone cutter of the rolling cone drill bit. In addition, the insert includes a cutting portion extending from the base portion. The base portion has a radially outer surface including a non-cylindrical axial retention feature configured to prevent the insert from moving axially out of the mating socket or a non-cylindrical torque holding feature configured to prevent the insert from rotating relative to the cone cutter.
    Type: Application
    Filed: November 26, 2012
    Publication date: May 29, 2014
    Applicant: National Oilwell DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro
  • Patent number: 8733475
    Abstract: Disclosed is a rolling cone drill bit with inner row cutting teeth having portions shielded with an erosion-resistant material that differs in material properties from the tooth's core portion that is more impact resistant. The tooth includes shielding on at least a portion of the upstream end and along portions of the flanking surfaces. It includes shield-free portions on the flanks between the root and the tooth crest. Most of the tooth's perimeter is made of the core material and is free of shielding. Gage row teeth may be angled and form a channel to direct drilling fluid from the gage region of the borehole to locations where the inner row teeth are generating most cuttings. Nozzles are provided with non-uniform orientations.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: May 27, 2014
    Assignee: National Oilwell DHT, L.P.
    Inventors: Thang Vo, Tom Scott Roberts, Craig Ivie, Douglas Caraway
  • Publication number: 20140138161
    Abstract: A rolling cone drill bit for drilling a borehole in earthen formations includes a bit body having a bit axis. In addition, the rolling cone drill bit includes a rolling cone cutter mounted on the bit body and having a cone axis of rotation. The cone cutter includes a cone body, a plurality of teeth arranged in a first inner row, and a plurality of inserts. Each insert is disposed within one tooth in the first inner row.
    Type: Application
    Filed: November 16, 2012
    Publication date: May 22, 2014
    Applicant: NATIONAL OILWELL DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro
  • Patent number: 8731717
    Abstract: Methods include one or more of robotically positioning a cutting element on an earth-boring tool, using a power-driven device to move a cutting element on an earth-boring tool, and robotically applying a bonding material for attaching a cutting element to an earth-boring tool. Robotic systems are used to robotically position a cutting element on an earth-boring tool. Systems for orienting a cutting element relative to a tool body include a power-driven device for moving a cutting element on or adjacent the tool body. Systems for positioning and orienting a cutting element on an earth-boring tool include such a power-driven device and a robot for carrying a cutting element. Systems for attaching a cutting element to an earth-boring tool include a robot carrying a torch for heating at least one of a cutting element, a tool body, and a bonding material.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: May 20, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: David Keith Luce, Sean W. Wirth, Alan J. Massey, Crystal A. Parrot
  • Patent number: 8698038
    Abstract: The present invention relates to a system and method for automated or “robotic” application of hardfacing to the surface of a steel-toothed cutter of a rock bit. In particular, the system incorporates a grounded adapter plate and chuck mounted to a robotic arm for grasping and manipulating a rock bit cutter beneath an electrical or photonic energy welding source, such as a plasma arc welding torch manipulated by a positioner. In this configuration, the torch is positioned substantially vertically and oscillated along a horizontal axis as the cutter is manipulated relative along a target path for the distribution of hardfacing. Moving the cutter beneath the torch allows more areas of more teeth to be overlayed, and allows superior placement for operational feedback, such as automatic positioning and parameter correction. In the preferred embodiment, sensors provide data to the control system for identification, positioning, welding program selection, and welding program correction.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: April 15, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: David K. Luce, Alan J. Massey, Kenneth E. Gilmore, Keith L. Nehring
  • Publication number: 20140076639
    Abstract: A rolling cone drill bit for cutting a borehole comprises a rolling cone cutter mounted on a bit body and adapted for rotation about a cone axis. Further, the bit comprises a tooth extending from the cone cutter. The tooth includes a base at the cone cutter and an elongate chisel crest distal the cone cutter. The crest extends along a crest median line between a first crest end and a second crest end and includes an elongate crest apex. The tooth also includes a first flanking surface extending from the base to the crest, and a second flanking surface extending from the base to the crest. The first flanking surface and the second flanking surface taper towards one another to form the chisel crest. Moreover, the tooth includes a first raised rib extending continuously along the first flanking surfaces and across the chisel crest to the second flanking surface.
    Type: Application
    Filed: November 7, 2013
    Publication date: March 20, 2014
    Inventors: Thang Vo, Tom Scott Roberts, Adrian Reyes, Robert Morton
  • Publication number: 20140027180
    Abstract: In one aspect, a drill bit is disclosed that in one embodiment includes a pad configured to extend and retract from a surface of the drill bit, a pad on a face of the drill bit configured to extend and retract from the face, and a force application device configured to extend and retract the pad, the force application device including a hydraulically-operated rotating member coupled to speed reduction device configured to apply force on drive unit that applies force on the pad to cause the pad to extend from the drill bit face. In one aspect, the hydraulically-operated rotating member is a propeller operated by a fluid flowing through the drill bit.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 30, 2014
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Thorsten Schwefe
  • Patent number: 8561727
    Abstract: An exemplary cutting element for a rotary drill bit may have a forward end and a rearward end. The cutting element may include a substrate having a forward face, a rearward face, and at least one interface surface extending between the forward end and the rearward end. At least one of the forward face and the rearward face may be a substantially planar surface. The cutting element may also include a superabrasive layer bonded to the at least one interface surface of the substrate. The superabrasive layer may include at least one cutting edge extending between the forward end and the rearward end. An exemplary rotary drill bit may include at least one cutting element coupled to the bit body. The at least one cutting element may have a rearward end adjacent to the bit body and a forward end extending away from the bit body.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: October 22, 2013
    Assignee: US Synthetic Corporation
    Inventors: Bill J. Pope, Louis M. Pope
  • Publication number: 20130248255
    Abstract: Bits configured for drilling rock that are of the type that includes a plurality of teeth supported in pockets that are on a cutting face that is driven to rotate. The pockets are configured to allow the teeth to passively rotate while in the pockets. The present disclosure provides a bit having hardfacing around the pockets and related methods.
    Type: Application
    Filed: November 30, 2011
    Publication date: September 26, 2013
    Applicant: VERMEER MANUFACTURING COMPANY
    Inventors: Randy R. Runquist, Keith Allen Hoelting, Chris Fontana
  • Publication number: 20130228382
    Abstract: A drill bit comprises a plurality of annular blades coupled to a bit body. A plurality of gauge pads is coupled to the bit body and defines an outer cutting diameter. A circumferentially continuous gauge ring is coupled to the bit body and defines an inner cutting diameter. An inner cutting structure is coupled to the bit body and has a cutting diameter substantially equal to the inner cutting diameter.
    Type: Application
    Filed: February 22, 2013
    Publication date: September 5, 2013
    Applicant: National Oilwell Varco, L.P.
    Inventor: Richard J. SAUVAGEAU
  • Publication number: 20130199856
    Abstract: Cutting elements for an earth-boring tool include a substrate base and a cutting tip. The cutting tip may include a first generally conical surface, a second, opposite generally conical surface, a first flank surface extending between the first and second generally conical surfaces, and a second, opposite flank surface. In some embodiments, the cutting tip includes a central axis that is not co-linear with a longitudinal axis of the substrate base. In some embodiments, the cutting tip includes a surface defining a longitudinal end thereof that is relatively more narrow in a central region thereof than in a radially outer region thereof. Earth boring tools include a body and a plurality of such cutting elements attached thereto, at least one cutting element oriented to initially engage a formation with the first or second generally conical surface thereof. Methods of drilling a formation use such cutting elements and earth-boring tools.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 8, 2013
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Baker Hughes Incorporated
  • Publication number: 20130146367
    Abstract: A cutting structure may include an outer support element; and an inner rotatable cutting element comprising a cutting surface at its upper end; wherein the inner rotatable cutting element comprises at least one line contact along a circumferential side surface thereof and/or at least one point contact at a bottom face thereof.
    Type: Application
    Filed: November 14, 2012
    Publication date: June 13, 2013
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Smith International, Inc.
  • Publication number: 20130140094
    Abstract: A drill bit has a bit body, a plurality of blades extending radially from the bit body, wherein each blade comprises a leading face and a trailing face, a plurality of cutter pockets disposed on the plurality of blades, at least one rolling cutter, wherein each rolling cutter is disposed in one of the cutter pockets, and wherein each rolling cutter comprises a cutting face, a cutting edge, an outer circumferential surface, and a back face. A back retainer is disposed adjacent to the back face, wherein the back retainer protrudes partially into the rolling cutter along a rotational axis of the rolling cutter, and a front retainer is disposed adjacent to the at least one rolling cutter on the leading face of the blade. Each front retainer has a retention end, wherein the retention end is positioned adjacent to a portion of the cutting face of each rolling cutter, and an attachment end, wherein the attachment end is attached to a portion of the blade.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 6, 2013
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Smith International, INC.
  • Patent number: 8450637
    Abstract: A system and method for the automated or “robotic” application of hardfacing to a surface of a drill bit.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: May 28, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: David K. Luce, Alan J. Massey, Kenneth E. Gilmore, Timothy P. Uno, Keith L. Nehring
  • Publication number: 20130126247
    Abstract: A composite drill bit with a bit body configured at its upper extend for connection into a drillstring, comprising: a bit body (1) with at least one bit leg (3), at least one scraping-wheel (2) set with a cutter-row (4), and a set of cutters fixed thereon. The scraping-wheel (2) is mounted for rotation on the corresponding bit leg (3) with a large angular deflection ? in the range of 20°?|?|?90°. The cutters on the scraping-wheel break rock by means of successive scraping, forming a cross-cutting area on the bottomhole accompanied by the cutters on the fixed cutting unit, thus achieving high rock-breaking efficiency, even wear, high cooling performance, and a longer service life for the cutters, bearings and the drill bit.
    Type: Application
    Filed: January 12, 2013
    Publication date: May 23, 2013
    Inventors: Ying Xin Yang, Lian Chen, Min Lin, Zhu Pei, Hai Tao Ren
  • Publication number: 20130126246
    Abstract: A scraping-wheel drill bit with a bit body configured at its upper extend for connection into a drillstring, comprising: a bit body (1) with at least one bit leg (3), and at least one scraping-wheel (2) set with a cutter-row (4). The scraping-wheel (2) is mounted for rotation on the corresponding bit leg (3) with a large angular deflection ? which lies in the range of 20°?|?|?90°. The cutters on the scraping-wheel break rocks by means of successive scraping, forming a spiral-like tracks on the bottomhole, thus achieving high rock-breaking efficiency, even wear, high cooling performance, and a longer service life for the cutters, bearings and the drill bit.
    Type: Application
    Filed: January 12, 2013
    Publication date: May 23, 2013
    Inventors: Ying Xin Yang, Lian Chen, Min Lin, Zhu Pei, Hai Tao Ren
  • Publication number: 20130098688
    Abstract: A drill bit may include a bit body rotatable about a longitudinal axis and having, at one end, a connection for securing the drill bit to a drill string and having a face opposite the connection end; and a plurality of cutting structures having at least one fixed cutting structure disposed on the bit body face and at least one cutting body rotatably attached to the face of the bit body; wherein, in a rotated view of the plurality of cutting structures into a single plane, there is substantially no radial overlap between at least one fixed cutting structure and the at least one cutting body.
    Type: Application
    Filed: October 15, 2012
    Publication date: April 25, 2013
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Smith International, Inc.
  • 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: 8312942
    Abstract: Roller cone drill bits operable to form a borehole. A number of support arms may extend from each drill bit. A cutter cone assembly may be mounted on each support arm. A number of cutting elements or inserts may be disposed on an exterior surface of a cone assembly. A lifting surface may be formed on each support arm extending between a leading edge and a trailing edge of each support arm such that the lifting surfaces directs cuttings upward in a borehole. A wedge shaped portion may be formed on each support arm proximate the lifting surface and the trailing edge. An inlet to each lifting surface may be formed on the leading edge of each support arm.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: November 20, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Tuck L. Ho, Micheal B. Crawford
  • Patent number: 8307920
    Abstract: An earth boring drill bit that includes a cutting cone with a cutting disk. Compacts are inserted within the disk having a chisel shaped end set flush with the cutting disk periphery. The compact crests and cutting disk periphery form a generally seamless cutting surface. The cutting cone can further include cutting teeth thereon also having flush mounted compacts. The compacts can be made from a material such as cemented carbide, hardfacing, tungsten, tungsten alloys, tungsten carbide and the cutter made from steel.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: November 13, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Robert J. Buske, James L. Overstreet, Thomas M. Stefanik, Shyam Anandampillai, Robert D. Bradshaw
  • Patent number: 8268452
    Abstract: Methods for forming earth-boring tools include providing a metal or metal alloy bonding agent at an interface between a first element and a second element and sintering the first element, the second element, and the boding agent to form a bond between the first element and the second element at the interface. The methods may be used, for example, to bond together portions of a body of an earth-boring tool (which may facilitate, for example, the formation of cutting element pockets) or to bond cutting elements to a body of an earth-boring tool (e.g., a bit body of a fixed-cutter earth-boring drill bit or a cone of a roller cone earth-boring drill bit). At least partially formed earth-boring tools include a metal or metal alloy bonding agent at an interface between two or more elements, at least one of which may comprise a green or brown structure.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: September 18, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Nicholas J. Lyons, Jimmy W. Eason, Redd H. Smith, John H. Stevens
  • Publication number: 20120205160
    Abstract: An earth boring drill bit comprising: one or more legs; a bit body having a blade and a slot for receiving the leg; and one or more wedge between the leg and the slot fixing the leg within the slot. The slot may have two parallel sidewalls with one of the sidewalls forming an acute angle and the other forming an obtuse angle. The wedge may be secured immediately next to the obtuse angled sidewall. The wedge may have two obtuse angled sides. One or more bolts through each wedge may secure both the wedge and the leg to the bit body. In a preferred embodiment, an obtuse angled sidewall of the wedge is preferably secured immediately next to an acute angled side of the leg.
    Type: Application
    Filed: February 7, 2012
    Publication date: August 16, 2012
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Gregory L. Ricks, Floyd C. Felderhoff, Rudolf C. Pessier
  • Patent number: 8205692
    Abstract: A drill bit for cutting a borehole comprises a bit body. In addition, the drill bit comprises a rolling cone cutter mounted on the bit body and adapted for rotation about a cone axis. Further, the drill bit comprises at least one insert having a base portion secured in the rolling cone cutter and a cutting portion extending therefrom. The cutting portion includes a pair of flanking surfaces that taper towards one another to form an elongate chisel crest including a first crest end, a second crest end, and an apex positioned therebetween. A transverse radius of curvature at the first crest end is less than a transverse radius of curvature at the apex, and a transverse radius of curvature at the second crest end is less than the transverse radius of curvature at the apex.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: June 26, 2012
    Assignee: Smith International, Inc.
    Inventors: Scott D. McDonough, Brandon M. Moss, James C. Minikus
  • Patent number: 8195438
    Abstract: New cutting structures for roller cone drill bits are disclosed. In one aspect, a drill bit includes a bit body, roller cones attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on each of the roller cones, such that axial force on the bit during drilling is substantially balanced between the cones. In another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that the amount of work performed by each cone during drilling is substantially the same as the amount of work performed by each of the other cones. In yet another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that distribution of axial force on the bit is optimized. Additional aspects of the invention are also disclosed.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: June 5, 2012
    Assignee: Smith International, Inc.
    Inventors: Amardeep Singh, Ying Xiang, Sujian Huang
  • Publication number: 20120111637
    Abstract: A rotary drill bit having blades with gage pads disposed on exterior portions thereof to improve steerability of the rotary drill bit during formation of a directional wellbore without sacrifice of lateral stability. One or more of the gage pads may include radially tapered exterior portions and/or cut out portions to assist with reducing wear of the associated gage pad. For some applications, a rotary drill bit may be formed having blades with gage pads having a relatively uniform exterior surface. Hard facing material and/or buttons may be disposed on exterior portions of the gage pad to form a radially tapered portion to improve steerability, reduce wear of the gage pad and/or improve ability of the rotary drill to form a wellbore having a generally uniform inside diameter, particularly during directional drilling of the wellbore.
    Type: Application
    Filed: November 3, 2011
    Publication date: May 10, 2012
    Inventors: Shilin Chen, Riun Ashlie
  • Patent number: 8096372
    Abstract: An improved cutter for fixed cutter drill bits includes a base portion with a longitudinal axis that extends through a center of the base portion and a cutting face which is generally centered with the base portion. The cutting face has a periphery edge geometry comprising a first arcuate segment and a second arcuate segment spaced apart and arranged opposite each other with linear edge segments disposed there between forming sides of the cutting face. The cutting face spans a maximum edge-to-edge dimension L in a first direction that corresponds to a major axis of the cutting face. The cutting face spans a maximum edge-to-edge dimension W in a second direction, which is perpendicular to the first direction, and W is less than L.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: January 17, 2012
    Assignee: Smith International, Inc.
    Inventors: Yuelin Shen, Youhe Zhang, Sujian Huang, Peter T. Cariveau
  • Patent number: 8056652
    Abstract: A hardfacing composition for a drill bit that includes an abrasive phase comprising a plurality of abrasive particles having a barrier coating deposited by atomic layer deposition disposed thereon; and a binder alloy is disclosed. Drill bits having hardfacing compositions that include an abrasive phase comprising a plurality of abrasive particles having a barrier coating deposited by atomic layer deposition disposed thereon; and a binder alloy are also disclosed.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: November 15, 2011
    Assignee: Smith International, Inc.
    Inventors: Gregory T. Lockwood, Guodong Zhan
  • Patent number: 8028773
    Abstract: A drill bit for cutting a borehole having a borehole sidewall, corner and bottom, includes a bit body having a bit axis and a rolling cone cutter mounted on the bit body and adapted for rotation about a cone axis. Further, the drill bit includes at least one insert having a base portion secured in the rolling cone cutter and having a cutting portion extending therefrom. The cutting portion of the at least one insert has a cutting surface including at least one flute.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: October 4, 2011
    Assignee: Smith International, Inc.
    Inventors: Amardeep Singh, Mohammed Boudrare
  • Publication number: 20110155472
    Abstract: Earth-boring tools include combinations of shearing cutting elements and gouging cutting elements on a blade of the earth-boring tools. In some embodiments, a gouging cutting element may be disposed adjacent to a shearing cutting element on a blade of an earth-boring tool. Methods of forming earth-boring tools include providing such combination of at least one shearing cutting element and at least one gouging cutting element on a blade of an earth-boring tool.
    Type: Application
    Filed: June 3, 2010
    Publication date: June 30, 2011
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Nicholas J. Lyons, Danny E. Scott, Rudolf Carl Pessier, David Gavia, Juan Miguel Bilen