Plural Separable Cutter Elements Patents (Class 175/412)
  • Patent number: 9770768
    Abstract: A rotary cutting tool, such as a slotting cutter, includes a cutter body rotatable in a predetermined direction on a central axis perpendicular to a plane of the cutter body. A plurality of cutting insert-receiving pockets are formed at predetermined locations about the cutter body. A cantilevered member can be integrally formed in the cutter body or attached to the cutter body as a separate component. A tip of the cantilevered member at least partially extends into each insert-receiving pocket such that the cantilevered member exerts a biasing force against a cutting insert at a location so as to counteract a tendency of the cutting insert to rotate within the insert-receiving pocket during a cutting operation.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: September 26, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Kevin Michael Gamble, James Michael Waggle
  • Patent number: 9010464
    Abstract: A roof-bolt drill bit may have a bit body rotatable about a central axis. At least one coupling pocket may be defined in the bit body. At least one cutting element may be at least partially disposed in the at least one coupling pocket. The at least one cutting element may include a cutting face, an element back surface, and an element side surface extending around an outer periphery of the cutting face. The element side surface may include a first element side surface abutting a first pocket side surface of the at least one coupling pocket and a second element side surface abutting a second pocket side surface of the at least one coupling pocket. At least one of the first element side surface and the second element side surface may have a substantially planar surface.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: April 21, 2015
    Assignee: Dover BMCS Acquistion Corporation
    Inventor: E. Sean Cox
  • Publication number: 20150075875
    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: Application
    Filed: November 26, 2014
    Publication date: March 19, 2015
    Inventor: Shilin Chen
  • Patent number: 8899356
    Abstract: A roof-bolt drill bit may have a forward end, a rearward end, and a rotational axis extending between the forward end and the rearward end. A cutting element for the roof-bolt drill bit may include a cutting face and a peripheral surface extending around an outer periphery of the cutting face. The cutting element may include at least one chamfer region and a peripherally extending chamfer extending from the at least one chamfer region along the outer periphery of the cutting element, a width of the at least one chamfer region being greater than a width of the peripherally extending chamfer.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: December 2, 2014
    Assignee: Dover BMCS Acquisition Corporation
    Inventor: Russell Roy Myers
  • Patent number: 8789625
    Abstract: A modular fixed cutter earth-boring bit body includes a blade support piece and at least one blade piece fastened to the blade support piece. A modular fixed cutter earth-boring bit and methods of making modular fixed cutter earth-boring bit bodies and bits also are disclosed.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: July 29, 2014
    Assignee: Kennametal Inc.
    Inventors: Prakash K. Mirchandani, Michale E. Waller, Jeffrey L. Weigold, Alfred J. Mosco
  • Patent number: 8763727
    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: July 2, 2013
    Date of Patent: July 1, 2014
    Assignee: US Synthetic Corporation
    Inventors: Craig H. Cooley, Jeffrey B. Lund, Jair J. Gonzalez
  • Patent number: 8757298
    Abstract: A drilling unit for drilling a borehole and having an outer drill bit being rotationally driven by a primary rotary drive mechanism about a primary axis of rotation and having an outer bit cutting face disposed for drilling engagement with formation material. The outer drill bit defines an inner bit passage intersecting the outer bit cutting face. An inner drill bit is rotationally driven within the inner bit passage by a secondary rotary drive mechanism and has a secondary axis of rotation that can be the same or can be laterally offset from the primary axis of rotation. An inner bit cutting face is defined by the inner drill bit and is located within the inner bit passage. Rotation of the outer drill bit for borehole drilling causes orbital rotation of the inner drill bit about the primary axis of rotation simultaneously with rotation of the inner drill bit about the secondary axis of rotation for continuously cutting away formation material at the central region of the borehole being drilled.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: June 24, 2014
    Inventor: Edwin J. Broussard, Jr.
  • Patent number: 8720611
    Abstract: Downhole drilling tools designed and manufactured to reduce bit axial force and torque and to enhance drilling efficiency comprising laying out some cutters in one spiral direction of rotation about a bit rotational axis and other cutters in an opposite spiral direction of rotation; evaluating forces acting on cutters during simulated engagement with a downhole formation (straight and transitional drilling); and modifying cutter layout with respect to a spiral direction of rotation. Some embodiments further comprise, prior to simulation, placing cutters in cutter groups/sets at respective locations to obtain a level of force balance. 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. Cutter layout procedures and algorithms to minimize respective bit forces and in some embodiments to obtain force balance are described.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: May 13, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Shilin Chen
  • Patent number: 8499859
    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: October 4, 2012
    Date of Patent: August 6, 2013
    Assignee: US Synthetic Corporation
    Inventors: Craig H. Cooley, Jeffrey B. Lund, Jair J. Gonzalez
  • Patent number: 8336648
    Abstract: The present disclosure provides mechanical attachments of TSD body to a carrier or substrate sufficient to allow eventual conventional attachment of the TSD to a drill bit or other component. According to one aspect, the disclosure includes a composite assembly including a thermally stable diamond (TSD) body and a substrate with aligned holes and a joining pin located in the aligned holes to mechanically attach the TSD body and substrate. The composite assembly may lack any non-mechanical attachment between the TSD body and the substrate, or may lack particular types of non-mechanical attachments. The disclosure also provides drill bits and other devices containing such composite assemblies as well as methods of making such composite assemblies and drill bits or other devices.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: December 25, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Gary E. Weaver, Seth G. Anderle, Ram L. Ladi
  • Patent number: 8312941
    Abstract: A modular fixed cutter earth-boring bit body includes a blade support piece and at least one blade piece fastened to the blade support piece. A modular fixed cutter earth-boring bit and methods of making modular fixed cutter earth-boring bit bodies and bits also are disclosed.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: November 20, 2012
    Assignee: TDY Industries, LLC
    Inventors: Prakash K. Mirchandani, Michale E. Waller, Jeffrey L. Weigold, Alfred J. Mosco
  • Publication number: 20120273275
    Abstract: A drilling unit for drilling a borehole and having an outer drill bit being rotationally driven by a primary rotary drive mechanism about a primary axis of rotation and having an outer bit cutting face disposed for drilling engagement with formation material. The outer drill bit defines an inner bit passage intersecting the outer bit cutting face. An inner drill bit is rotationally driven within the inner bit passage by a secondary rotary drive mechanism and has a secondary axis of rotation that can be the same or can be laterally offset from the primary axis of rotation. An inner bit cutting face is defined by the inner drill bit and is located within the inner bit passage. Rotation of the outer drill bit for borehole drilling causes orbital rotation of the inner drill bit about the primary axis of rotation simultaneously with rotation of the inner drill bit about the secondary axis of rotation for continuously cutting away formation material at the central region of the borehole being drilled.
    Type: Application
    Filed: April 26, 2011
    Publication date: November 1, 2012
    Inventor: Edwin J. Broussard, JR.
  • Patent number: 8286735
    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: December 19, 2011
    Date of Patent: October 16, 2012
    Assignee: US Synthetic Corporation
    Inventors: Craig H. Cooley, Jeffery B. Lund, Jair J. Gonzalez
  • Patent number: 8272458
    Abstract: A drill bit for rotary drilling a well bore of a subterranean formation which has replaceable blades which overlap and interlock with each other and have retention means on more than one axis. The replaceable blades may have cutters with enhanced retention by brazing ring grooves and the body may be flared at its bottom to better retain the blades and cutters.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: September 25, 2012
    Inventor: Alan L. Nackerud
  • Publication number: 20120103695
    Abstract: This invention relates to a ground drilling or cutting tool comprising a cutting element removably attached thereto by attachment means, the tool further including retention means adapted to maintain attachment of the cutting element to the tool in the event that the attachment means fails. The retention means comprises a first surface on a side of the cutting element, a mounting recess in the cutting tool in which at least a portion of said cutting element locates, a second surface in a side of the mounting recess against which said first surface locates, channels in each of said first and second surfaces that align so as to cooperatively define a dowel hole when said first and second surfaces locate together, at least one dowel that locates in the dowel hole, and means for retaining the or each dowel within the dowel hole.
    Type: Application
    Filed: November 30, 2009
    Publication date: May 3, 2012
    Applicant: TRANSCO MANUFACTURING AUSTRALIA PTY LTD
    Inventor: George Fyfe
  • Patent number: 8146683
    Abstract: A drilling assembly for drilling two or more casing sections into a subterranean formation includes a first casing bit and a second casing bit, each casing bit of different diameter affixed to a respective casing section of different diameter, at least two casing bits and the two or more casing sections arranged in a telescoping relationship. The second casing bit includes a bit body having a face on which two different types of cutting elements are disposed, the first type being cutting elements for drilling at least one subterranean formation and the second type being cutting elements for drilling through the first casing bit.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: April 3, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Eric E. McClain, John C. Thomas
  • Patent number: 8118119
    Abstract: A drill bit includes a plurality of continuous segments impregnated with diamond that are each mounted to form a corresponding blade. The regions between the blades define a plurality of fluid passages on the bit face. The blades extend radially outwardly to the gage. The continuous segments may be either straight or spiral in design. Furthermore, the design of the segments supports varying one or more of: diamond content, width, back rake angle and/or relief angle along a length of the segment.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: February 21, 2012
    Assignee: Varel International Ind., L.P.
    Inventors: Alfazazi Dourfaye, Michel De Reynal
  • Publication number: 20120000712
    Abstract: The invention relates to a cutter head (10) for dredging ground under water, this cutter head being suitable for attachment rotatably around a central axis to the ladder (2) of a cutter suction dredger (1) and for being moved through the ground (9) therewith in a lateral sweeping movement, the cutter head comprising a base ring (13), a hub (14) situated at a distance in the direction of the central axis from the base ring, and a plurality of arms (15) extending from the base ring to the hub, wherein a passage opening (16) is located between arms and wherein the arms are provided with a first series of cutting tools on a leading part (15a) relative to the direction of rotation of the cutter head, and wherein at least one arm is provided with a second series of cutting tools on a part of the arm (15b) facing away from the central axis.
    Type: Application
    Filed: December 29, 2009
    Publication date: January 5, 2012
    Inventor: Stijn Claessens
  • Publication number: 20110315447
    Abstract: Downhole cutting tools such as blade mills comprise a body having a first end for connection with a rotating component of a drill string and a cutting end for rotation in unison with the body. The cutting end comprises at least two blades, each of the at least two blades comprising a front sidewall surface, a back sidewall surface, an inner end, an outer end, and at least one beveled portion disposed along the front sidewall surface toward the inner end of each of the at least two blades. At least one of the beveled portions comprise at least one cutting element disposed thereon that is disposed across a center point of the face of the cutting end to provide for cutting away an object disposed in a wellbore to occur across a center point of the cutting end.
    Type: Application
    Filed: June 24, 2010
    Publication date: December 29, 2011
    Inventors: Calvin J. Stowe, II, Andrew D. Ponder
  • Patent number: 8079431
    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: March 17, 2009
    Date of Patent: December 20, 2011
    Assignee: US Synthetic Corporation
    Inventors: Craig H. Cooley, Jeffery B. Lund, Jair J. Gonzalez
  • Patent number: 8011456
    Abstract: A cutting element for use with a drill bit includes a substrate having a longitudinal axis, a lateral surface substantially symmetric about the longitudinal axis and one or more key elements coupled to the lateral surface. The lateral surface lies between an insertion end and a cutting end of the substrate. The one or more key elements are substantially axially aligned with the longitudinal axis and configured to selectively rotationally locate the substrate in a pocket. A drill bit configured for retaining a cutting element having one or more key elements is also disclosed.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: September 6, 2011
    Assignee: Baker Hughes Incorporated
    Inventor: William H. Sherwood, Jr.
  • Patent number: 7926597
    Abstract: A blade, which is useful on a tool that impinges earth strata, that has a blade body with a leading surface. The blade body has a first portion defining at least a part of the leading surface and a second portion. The first portion is made of a first material composition and the second portion is made of a second material composition.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: April 19, 2011
    Assignee: Kennametal Inc.
    Inventors: Shivanand I. Majagi, Jonathan W. Bitler
  • Publication number: 20110079445
    Abstract: Provided is a drill head for deep-hole drilling which does not generate such a disc that clogs a cutting chip discharge port when a head main body of the drill head penetrates a work material. The drill head is mounted with a central cutting blade tip 6 at the head center portion so as for a blade edge 6a thereof to be inclined downward toward the head center portion, a circumferential cutting blade tip 7 at a circumferential portion so as for a blade edge 7a thereof to be inclined upward toward the head center portion, and an intermediate cutting blade tip 8 therebetween so as for a blade edge 8a thereof to be inclined upwardly and inwardly toward the head center portion, while the cutting blade tips face a cutting chip discharge port 4 or 5. The drill head includes a head main body 2 having an interior hollow portion 3 serving as a cutting chip discharge passage which communicates with the discharge ports 4 and 5.
    Type: Application
    Filed: December 14, 2010
    Publication date: April 7, 2011
    Applicant: Unitac, Inc.
    Inventor: Takuji Nomura
  • Publication number: 20110024199
    Abstract: An elastomeric seal ring is located between each bearing pin and each cone of an earth-boring bit. An auxiliary ring or band is imbedded within an annular recess formed in the inner diameter of the seal ring. A portion of the inner diameter of the seal ring as well as the auxiliary ring are in dynamic contact with the bearing pin. The auxiliary ring has a geometric feature that enhances radial flexibility but prevents it from sealing. The geometric feature may be a transverse cut, notches in either the inner or outer diameters, or holes extending between the sides of the auxiliary ring. The auxiliary ring has lubricating properties.
    Type: Application
    Filed: August 3, 2009
    Publication date: February 3, 2011
    Applicant: Baker Hughes Incorporated
    Inventors: Anton Zahradnik, Gregory L. Ricks, Gregory W. Peterson, Don Quy Nguyen, Chih C. Lin, Terry J. Koltermann
  • Publication number: 20100307837
    Abstract: A casing end tool has a bowl-like (or cup-like) body defined by a wall having an outer convex surface and an inner concave surface opposite of the outer convex surface. The bowl-like body has a center axis. The inner concave surface is non-axisymmetric with respect to the center axis, while the outer convex surface is axisymmetric with respect to the center axis. The non-axisymmetric configuration is provided in one implementation through the presence of a set of raised boss or land structures formed on the inner concave surface.
    Type: Application
    Filed: June 3, 2010
    Publication date: December 9, 2010
    Applicant: Varel International, Ind., L.P.
    Inventors: William W. King, Michael Reese, Steven W. Drews, Ian Alastair Kirk
  • Patent number: 7743855
    Abstract: A drill bit includes a cutter element having a tapered and faceted side surface extending to a peak, and a polygonal wear face that slopes from the peak toward the cutter element base. The cutter element is mounted in a cone cutter of a rolling cone drill bit and, in certain embodiments, is positioned such that, when the cutter element is in a position farthest from the bit axis, the wear face generally faces and is parallel to the borehole sidewall and the peak engages the borehole bottom.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: June 29, 2010
    Assignee: Smith International, Inc.
    Inventor: Brandon Moss
  • Publication number: 20090321138
    Abstract: A drill bit is described herein, having a first bit face with a first plurality of cutters oriented to bore in a first direction, and a second bit face with a second plurality of cutters oriented to bore in one or more second directions. The pluralities of cutters enable functional articulation of the drill bit, such that the drill bit can change direction within a borehole without requiring removal of the drill bit. The drill bit can thereby drill in a downhole direction and lateral directions, can back ream through the borehole, and can provide the borehole with one or more oversized regions, as desired.
    Type: Application
    Filed: June 22, 2009
    Publication date: December 31, 2009
    Inventors: James Shamburger, David Wilde
  • Publication number: 20090308664
    Abstract: A drill bit for rotary drilling a well bore of a subterranean formation which has replaceable blades which overlap and interlock with each other and have retention means on more than one axis. The replaceable blades may have cutters with enhanced retention by brazing ring grooves and the body may be flared at its bottom to better retain the blades and cutters.
    Type: Application
    Filed: June 11, 2009
    Publication date: December 17, 2009
    Inventor: Alan L. Nackerud
  • Patent number: 7533739
    Abstract: A cutting element assembly for use on a rotary drill bit for forming a borehole in a subterranean formation. A cutting element includes a substrate having a base member affixed to a back surface of the substrate is disclosed, wherein the base member includes a recess configured to secure the base member to a rotary drill bit. An inner member may be positioned within the recess of the base member. Also, a structural element may be coupled to the inner member or to the base member. A rotary drill bit may include a cutting element assembly. In addition, a method of securing a cutting element to a rotary drill bit may include providing a base member affixed to a cutting element and positioning the base member within a recess of the rotary drill bit.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: May 19, 2009
    Assignee: US Synthetic Corporation
    Inventors: Craig H. Cooley, Timothy N. Sexton, David P. Miess
  • Publication number: 20080302573
    Abstract: A drilling tool including at least two cutting elements (e.g., redundant or upon a selected profile region) sized, positioned, and configured thereon so as to contact or encounter a change in at least one drilling characteristic of a subterranean formation along an anticipated drilling path prior to other cutting elements thereon encountering same is disclosed. Methods of designing a drilling tool are also disclosed including placing such cutting elements upon the cutting element profile in relation to a predicted boundary surface along an anticipated drilling path. Methods of operating a drilling tool so as to initially contact a boundary surface between two differing regions of a subterranean formation drilled with at least two cutting elements is disclosed. The cutting elements configured on drilling tools and methods of the present invention may be designed for limiting lateral force or generating a lateral force having a desired direction during drilling associated therewith.
    Type: Application
    Filed: August 22, 2008
    Publication date: December 11, 2008
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: L. Allen Sinor, Jack T. Oldham
  • Publication number: 20070251732
    Abstract: A modular fixed cutter earth-boring bit body includes a blade support piece and at least one blade piece fastened to the blade support piece. A modular fixed cutter earth-boring bit and methods of making modular fixed cutter earth-boring bit bodies and bits also are disclosed.
    Type: Application
    Filed: April 20, 2007
    Publication date: November 1, 2007
    Applicant: TDY Industries, Inc.
    Inventors: Prakash K. Mirchandani, Michael E. Waller, Jeffrey L. Weigold, Alfred J. Mosco
  • Patent number: 7096982
    Abstract: A method and apparatus for a drilling with casing includes therewith a drill shoe configured for later drilling through thereof in situ, with cutters retainable thereon in response to the forces encountered during borehole drilling, yet moveable from the envelope through which the later drill shoe will pass when cutting through the in situ drill shoe. The drill shoe includes one or more profiles thereon, into which blades carrying the formation drilling cutters are disposed. The profiles include at least one projection thereon, which is received within a mating slot in the blades. The blades also may be configured to have opposed sections which are configured with respect to one another to have an included angle of less than ninety degrees.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: August 29, 2006
    Assignee: Weatherford/Lamb, Inc.
    Inventors: David McKay, David M. Haugen
  • Patent number: 6702046
    Abstract: The drill device has a body with a front end and a rear end and which is connectable to the shaft of a drilling apparatus. A plurality of angularly spaced apart slots are formed in the exterior of the device which extend between the front and rear ends. Each slot has a lip extending from each of its front and rear ends respectively. A cutting member is provided for each of the slots with each cutting member having a connecting portion located in one of the slots and having a forward end and a rearward. Each connecting portion has a hook near its front and rear ends respectively for connection to the lips of the slot in which it is located.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: March 9, 2004
    Inventors: Charles T. Webb, Roy L. Chandler
  • Publication number: 20030150650
    Abstract: A steerable horizontal subterranean drill bit apparatus is disclosed. The apparatus may include a drill bit and a housing. The drill bit may include an offset drilling fluid seal.
    Type: Application
    Filed: July 31, 2002
    Publication date: August 14, 2003
    Inventor: John B. Sved
  • Publication number: 20030150651
    Abstract: A steerable horizontal subterranean drill bit apparatus is disclosed. The apparatus may include a drill bit and a housing. The drill bit may include offset cutting tooth paths.
    Type: Application
    Filed: July 31, 2002
    Publication date: August 14, 2003
    Inventor: John B. Sved
  • Publication number: 20030150652
    Abstract: A steerable horizontal subterranean drill bit apparatus is disclosed. The apparatus may include a drill bit and a housing. The drill bit may include elevated wear protector receptacles in particular locations and configurations.
    Type: Application
    Filed: July 31, 2002
    Publication date: August 14, 2003
    Inventor: John B. Sved
  • Publication number: 20030150649
    Abstract: A steerable horizontal subterranean drill bit apparatus is disclosed. The apparatus may include a drill bit and a housing. The drill bit may include a one-bolt attachment system.
    Type: Application
    Filed: July 31, 2002
    Publication date: August 14, 2003
    Inventor: John B. Sved
  • Patent number: 6450269
    Abstract: A bit for directional boring according to the invention includes a bit body having a frontwardly facing sloped face effective for steering the bit in dirt. The sloped face defines a steering plane that defines an acute included angle relative to a lengthwise axis of rotation of the bit. A connection is provided at the rear of the bit body permitting the bit to be removably mounted at the lead end of a drill string, and one or more internal passages are provided in the bit body for carrying a drilling fluid to a front end of the bit body. A first cutting tooth is mounted on the bit body and extends frontwardly from the bit body at a first angle that causes the first tooth to cut along a first circular path as the bit rotates.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: September 17, 2002
    Assignee: Earth Tool Company, L.L.C.
    Inventors: Steven W. Wentworth, Robert F. Crane
  • Patent number: 6131675
    Abstract: A combination milling and drilling bit which can be converted from a first type of cutting operation to a second type of cutting operation by hydraulically moving a plurality of movable blades to extend beyond a plurality of fixed blades. The fixed blades are dressed with cutting inserts suitable for the first type of cutting operation, while the movable blades are dressed with cutting inserts suitable for the second type of cutting operation.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: October 17, 2000
    Assignee: Baker Hughes Incorporated
    Inventor: James W. Anderson
  • Patent number: 6102142
    Abstract: A drilling tool including a drilling head equipped with cutting edges and fitted with several shock-absorption elements, of which at least one part is made of an elastomer material. Each shock-absorption element having a block incorporating one portion inserted inside a receptor housing formed on the tool surface, and a portion which projects outward beyond the receptor housing.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: August 15, 2000
    Assignees: Total,, Security Diamint Boart Stratabit
    Inventors: Alain Besson, Robert Delwiche, Pierre Lecour
  • Patent number: 5788430
    Abstract: A drilling tool for rotary percussion drilling including: a drilling body defining: a longitudinal centerline axis extending in a drilling direction; a bore extending in a direction of the centerline axis and having a bore bottom; and a recess extending in a direction transverse to the centerline axis and eccentrically with respect thereto. A centering drill is adapted to move in the drilling direction and has a centering drill end, a centering drill shank and a chucking portion having a flattened clearance on one side thereof, the centering drill shank having an end side cylinder section for limiting an axial path of the centering drill during its movement in the drilling direction, the centering drill extending in the bore of the drilling body and the bore bottom being effective as an exclusive stop for the centering drill end when the centering drill is being subjected to percussion stress.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: August 4, 1998
    Assignee: Hawera Probst GmbH
    Inventors: Hans-Peter Meyen, Bernhard Moser
  • Patent number: 5286144
    Abstract: An apparatus and method for cutting a hole in a liner installed in a conduit. Included in the apparatus is a carriage and a cutting head that are rotated to cut the liner. A lateral axis extends through the carriage. A skid constrains the carriage and the cutting head. The cutting head is substantially positioned over the center of gravity of the carriage to provide stability during cutting. The cutting head moves vertically with the use of a cam. The cutter also moves laterally and may rotate about the axis when cutting the hole. Prior to cutting the hole, the skid extends outward to hold the carriage in place. The apparatus also includes a specialized cutter having cutting bars along its outside perimeter and along its top surface.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: February 15, 1994
    Inventor: Ward J. Griner
  • Patent number: 5070951
    Abstract: A rotary well drilling unit, particularly for water wells, comprises a tubular rotatable drill string string through which water is pumped. Attached to the lower end of the drill string is a drill head having side-by-side cutter blades. The cutter blades are cammed radially outwardly to expand in diameter when the drill string is lowered to drill a hole sized to receive a well casing lowered behind the drill, and are cammed radially inwardly so as to contract in diameter to clear the casing when the string is lifted. The same drill may be used for drilling wells of different diameters by merely substituting cutter blades.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: December 10, 1991
    Inventor: Wilmer C. Wrhen
  • Patent number: 5059068
    Abstract: A rotary slot cutting tool having a flat sided disc shaped body with a central bore, a plurality of apertures spaced about the periphery of the body each aperture having in it a cutting insert held in position by the shape of the aperture against radial movement, each aperture being shaped in such a manner that on the application of a force acting radially outwards on the circumference on the bore of the body, faces of the aperture are caused to spread apart to permit removal and replacement of the inserts in an axial direction. The invention further provides an insert for use in rotary and other slot cutting tools.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: October 22, 1991
    Assignee: A. E. Bishop & Associates Pty., Ltd.
    Inventor: David W. Scott
  • Patent number: 5010967
    Abstract: An apparatus for milling away tubular conduits encased within well bores is disclosed. The milling device consists of a cylindrical body. The body forms longitudinal slots therein for radially disposed replaceable cutter blades that are inserted through the slots from the inside of the body. A central mandrel mechanically locks the replaceable blades between the mandrel and the tubular body. A finned pilot head or guide is affixed to the downstream end of the milling apparatus, the opposite threaded upstream end is adapted to be connected to a drill string.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: April 30, 1991
    Assignee: Smith International, Inc.
    Inventor: Praful C. Desai
  • Patent number: 4610318
    Abstract: A rotary cutter assembly comprises a drill head having a plurality of receptacles which releasably receive rolling cutter bit assemblies. The bit assemblies are locked in position by a locking sleeve connecting transverse fluid passageways of the drill head and bit assembly. Radially locking means in the form of pins received in complementary slots parallel to the rotational axis of the rotary cutter assembly are also provided.
    Type: Grant
    Filed: February 15, 1984
    Date of Patent: September 9, 1986
    Inventor: Robert D. Goodfellow
  • Patent number: 4452325
    Abstract: A cutting tool comprises a compact bundle of elongated, substantially cylindrical fibers or rods formed from a cemented metal carbide material. The bundle of fibers is shrink-fitted within a metal collar to form a long-wearing cutting tool.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: June 5, 1984
    Assignee: Conoco Inc.
    Inventors: Frederick J. Radd, Elard L. Haden
  • Patent number: 4448270
    Abstract: An earth boring bit is shown of the type used to cut a shaft in the earth. The earth boring bit has a central bit body which is adapted to be driven to cut a shaft and which has an outer conical surface thereon. An outer ring segment carried on the central bit body has a conical surface for matingly engaging the central bit body conical surface whereby torque transmitted to the outer ring is transmitted through the mating conical surfaces to drive the central bit body to cut a shaft. The mating conical surfaces are preloaded to assure drivable contact between the surfaces. The effective cutting diameter of the earth boring bit can be varied by interchanging the outer ring segment.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: May 15, 1984
    Assignee: Hughes Tool Company
    Inventor: Robert J. Buske
  • Patent number: 4335794
    Abstract: A multi-cone roller bit with a central pot member is disclosed, having releasably secured legs carrying rolling cutters mounted on the pot. The legs have an upper portion which can be releasably secured in a recessed central portion of the pot and an abutment region which contacts the pot. A tongue and groove arrangement holds the leg and pot from relative movement with one another, and a central tapered plug is reciprocably movable so as to clamp and unclamp the legs to the pot.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: June 22, 1982
    Assignee: Kennametal Inc.
    Inventor: Robert D. Goodfellow
  • Patent number: 4252202
    Abstract: A drill bit consisting of a tubular, main body member having a set of threads at one end thereof connectable to a drill stem and an annular mounting edge on an opposite end thereof, the mounting edge having a plurality of circumferentially spaced, longitudinally disposed recesses, the main body member having an enlarged annular portion adjacent the annular mounting edge, the enlarged portion of the main body member having a plurality of circumferentially spaced recesses disposed at an angle relative to the axis of the main body member, each of the recesses in the enlarged portion of the main body member being disposed between a set of recesses in the annular mounting edge and providing a pair of converging surfaces, a plurality of blades, each of the blades being disposed in a recess in the mounting edge, substantially radially relative to the axis of the main body member, having a recess receiving a wall portion of the main body member and a surface aligned with a surface of an adjacent set of the sets of co
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: February 24, 1981
    Inventor: James A. Purser, Sr.