Forked Rotary Nontracking Patents (Class 175/397)
  • Patent number: 8631883
    Abstract: A sectorial force balanced drill bit, including conventional and bi-center drill bits, having the true center of rotation the same as, or about the same as, the bit mass axis. The bit mass axis is a longitudinal axis located off-center to the geometric axis of the bit and comprises the center of mass point. Additionally, a method for sectorially force balancing drill bits is provided. The method includes dividing the drill bit into one or more sections, calculating the magnitude and direction of the resultant radial imbalance force for the cutters of each section, adjusting the cutters and/or blades until the magnitude of the resultant radial imbalance force is about the same for each section and the direction of the resultant radial imbalance force for each section is about 2?/n, where n is the number of sections, from the adjacent section.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: January 21, 2014
    Assignee: Varel International Ind., L.P.
    Inventor: Alfazazi Dourfaye
  • Publication number: 20130025942
    Abstract: In a rotary drill, the drill is provided with at least one groove, of which one groove has a center lying on the axis of rotation of the drill. The two end points of the groove define a groove width, and the drill is provided with two or more cutting edges. Two cutting angles are defined. The groove has a left side and a right side. The rotary drill may further be used in a rotary drilling machine. The drill may be provided with a drill bit.
    Type: Application
    Filed: November 24, 2010
    Publication date: January 31, 2013
    Inventor: Kim Bauer
  • Patent number: 8127863
    Abstract: A drill bit for drilling a borehole in earthen formations comprising a bit body having a bit axis and a bit face. In addition, the drill bit comprises a primary blade extending radially along the bit face, the primary blade including a cutter-supporting surface that defines a blade profile in rotated profile view extending from the bit axis to an outer radius of the bit body. The blade profile is continuously contoured and includes a plurality of concave regions. Further, the drill bit comprises a plurality of cutter elements mounted to the cutter-supporting surface of the primary blade. Each cutter element on the primary blade has a forward-facing cutting face with a cutting edge adapted to penetrate and shear the earthen formation.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: March 6, 2012
    Assignee: Smith International, Inc.
    Inventors: Bala Durairajan, Carl M. Hoffmaster, Rolando Descarpontriez Arteaga
  • Publication number: 20110253457
    Abstract: A drill bit is disclosed herein, the drill bit having a bit body, a plurality of cutting blades extending radially from the bit body and having cutting elements disposed thereon, the plurality of cutting blades forming a cutting blade gage pad diameter configured to contact a formation, and a plurality of raised volumes of material extending from the bit body and devoid of cutting elements, the plurality of raised volumes of material forming a gage pad diameter configured to contact the formation, wherein the plurality of cutting blades and the plurality of raised volume of material are circumferentially spaced having fluid courses that extend therebetween.
    Type: Application
    Filed: April 19, 2011
    Publication date: October 20, 2011
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Yuelin Shen, Youhe Zhang, Bala Durairajan, Charles H. S. Douglas, III
  • Publication number: 20090283333
    Abstract: A drill bit that includes a bit body having a plurality of blades extending radially therefrom, the bit body comprising a first matrix region and a second matrix region, wherein the first matrix region is formed from a moldable matrix material; and at least one cutting element for engaging a formation disposed on at least one of the plurality of blades is disclosed.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 19, 2009
    Inventors: Gregory T. LOCKWOOD, Youhe Zhang, Yuelin Shen
  • Publication number: 20090084607
    Abstract: A drill bit includes at least one extension pad extending rotationally forward or backward of an associated blade in a gage region of the bit body. The extension pad includes a circumferential bearing surface that extends the circumferential bearing surface of the associated blade and reduces the chordal drop between any blade having an extension pad associated therewith and a circumferentially adjacent blade toward which the extension pad protrudes. A drill bit that reduces a chordal drop segment extending across a junk slot is also disclosed.
    Type: Application
    Filed: October 1, 2007
    Publication date: April 2, 2009
    Inventors: Stephen J. Ernst, Juan Miguel Bilen
  • Publication number: 20090065263
    Abstract: A drill bit comprises a bit body and a plurality of cutting blades extending radially from the bit body, the plurality of cutting blades further comprising cutting elements disposed thereon. The drill bit also comprises a plurality of utility blades extending radially from the bit body, the plurality of utility blades being free of cutting elements.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 12, 2009
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Yuelin Shen, Youhe Zhang
  • Publication number: 20080289881
    Abstract: A fixed cutter drill bit including a bit body having a plurality of primary blades extending radially from a bit center area, wherein the bit center area includes a partial connection between at least two of the plurality of primary blades. The fixed cutter drill bit further including at least one cutter disposed on at least one of the blades. Additionally, a method of designing a fixed cutter drill bit includes modeling the fixed cutter drill bit, the fixed cutter drill bit including a plurality of primary blades extending radially from a bit center area, wherein the plurality of primary blades includes a plurality of cutters. The method further including determining a center of an innermost cutter on each primary blade, creating a partial connection between the primary blades, and outputting the model of the fixed cutter drill bit.
    Type: Application
    Filed: May 23, 2008
    Publication date: November 27, 2008
    Inventors: Yuelin Shen, Youhe Zhang, Paul Higgins
  • Patent number: 7228922
    Abstract: A drill bit has a pair of cutting teeth with cutting elements extending from a cutting end portion of the drill bit. Each cutting tooth extends radially, outwardly parallel to a longitudinal axis of the drill steel. The cutting teeth are juxtaposed with one another on the longitudinal axis. Each cutting tooth includes a plurality of raised cutting elements connected to a plurality of lowered edge portions. The cutting elements produce concentric circular channels in the working surface of a rock formation, as the drill bit rotates during the cutting operation. The drill bit also includes a pocket for accumulating and removing dislodged material during the cutting operation.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: June 12, 2007
    Inventor: Donald L. DeVall
  • Patent number: 6932170
    Abstract: A drilling head (1) is disclosed, in particular for introduction into pipelines, with a rear connector piece (2) and a forward cutting body (3) of the size of the diameter, comprising cutting ribs (4), extending in the advancing direction (V), which have a convex arch and have a cutting edge (5) on both sides of the radial end thereof in the direction of the circumference. Conventional drilling heads can be applied only with difficulty in curved pipelines and have a tendency to damage the inner wall of the pipeline. The disclosed drilling head (1) has a cutting body (3) with a conical cutting head tip (7), surrounded by the back-cut tips (6) of the cutting ribs (4) which lie set back along a longitudinal axis (Y).
    Type: Grant
    Filed: November 22, 2001
    Date of Patent: August 23, 2005
    Inventor: Ute Petra Luth
  • Publication number: 20030066663
    Abstract: The key to this invention of a rotary hand-held tilling and weed removing device is simplicity. The three part design consisting of a 36″ shaft; a “T” shaped handle and two lock collars and only weighing 1.5 pounds makes it a multi purpose garden tool for use with any ⅜ household drill. Easlily attached to the drill chuck, the 2 inch wide rotary arms allow tilling and weed removal in very confined areas and precision control from the shaft handle adds to the ease of use. This simple design does not require blade or tiller bar replacement making it very cost effective. A low carbon, one piece, steel shaft requires no maintenance.
    Type: Application
    Filed: September 26, 2001
    Publication date: April 10, 2003
    Inventor: Robert McKill
  • Publication number: 20010030065
    Abstract: A PDC-equipped rotary drag bit especially suitable for directional drilling. Cutter chamfer size and backrake angle, as well as cutter backrake, may be varied along the bit profile between the center of the bit and the gage to provide a less aggressive center and more aggressive outer region on the bit face, to enhance stability while maintaining side cutting capability, as well as providing a high rate of penetration under relatively high weight on bit.
    Type: Application
    Filed: May 14, 2001
    Publication date: October 18, 2001
    Inventors: Christopher C. Beuershausen, Mark W. Dykstra, Roger Fincher, Roland Illerhaus, Steve R. Matson, James A. Norris, Michael P. Ohanian, Rudolf C.O. Pessier
  • Patent number: 6302224
    Abstract: Angled insertable drag bit teeth having a front portion at an oblique angle to a shank portion: the front portion is nearly parallel to the direction of thrust during cutting, and is bonded, along a substantial part of its length, to a groove in the bit body. The shank portion extends down into a pocket in the bit body. Preferably the front portion is faced with a superhard material such as polycrystalline-diamond-compact.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: October 16, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventor: William H. Sherwood, Jr.
  • Patent number: 6227317
    Abstract: A garden auger having an auger blade with a substantially rectangular body section for use with a drill motor. The preferred auger body including toed-in wings for rapidly clearing earth from the created hole and cutters formed at one end of the auger blade.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: May 8, 2001
    Inventor: Robert P. Severns
  • Patent number: 6202768
    Abstract: A rock drilling tool includes a pilot bit screw threaded into a front end of a drill rod. A reamer is mounted on the outside of the pilot bit. The reamer includes a central opening having a front portion and a rear portion. The front portion is connected to the pilot bit, and the rear portion constitutes a stiffening sleeve which extends around the outside of the drill rod.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: March 20, 2001
    Assignee: Sandvik AB
    Inventors: Daniel Lindgren, Per-Olof Liljebrand, Håkan Lindström
  • Patent number: 6123161
    Abstract: A rotary drill bit, for drilling holes in subsurface formations, comprises a bit body having a shank for connection to a drill string, a number of circumferentially spaced blades on the bit body extending outwardly away from the central axis of rotation of the bit, and a number of cutters mounted side-by-side along the leading edge of each blade. The cutters include primary cutters having cutting edges which define a primary cutting profile and secondary cutters having cutting edges which define a secondary cutting profile which is disposed inwardly of the primary cutting profile with respect to the bit body. The secondary cutters may be on different blades from the primary cutters, or may be mounted on the same blades, rearwardly of the primary cutters. At least the majority of the cutters are located at different distances away from the bit axis, so that as the bit rotates each secondary cutter follows a path which lies intermediate the paths followed by two primary cutters.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: September 26, 2000
    Assignee: Camco International (UK) Limited
    Inventor: Malcolm Roy Taylor
  • Patent number: 6032750
    Abstract: Drilling tool with a drill head with an end face pointing in the feed direction and which has a main bit, which forms a drill point located in the drill axis and the bit is inclined on either side in a substantially roof-shaped manner and the tool has drilling dust grooves. The main bit has a primary cutting edge, which extends radially over at least one side of the main bit, and a secondary cutting edge, which extends radially over substantially the remaining length of the main bit and is axially set back with respect to the primary cutting edge counter to the feed direction by at least the amount of feed in millimeters per revolution.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: March 7, 2000
    Assignee: Gebrueder Heller Dinklage GmbH
    Inventors: Heinrich Kersten, Hartmut Precht
  • Patent number: 5687807
    Abstract: A cutter for a trenchless boring apparatus includes a mount having a first end to be coupled to a free end of a drill pipe. A plurality of cutting teeth are secured to the mount with the teeth arranged in a helical pattern surrounding an axis of the mount.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: November 18, 1997
    Assignee: Vermeer Manufacturing Company
    Inventors: James Akers Woods, Randy Ray Runquist
  • Patent number: 5377773
    Abstract: A drill bit, and a cutter for a drill bit, are provided, wherein the cutter will encounter the formation with cutting surfaces of differing rake angles to optimize cutting efficiency. In most circumstances, the cooperating cutters will have differing, positive, and negative or neutral rakes. Cutters of differing rakes may be cooperatively paired on a drill bit such that the portion of a formation which is affected by the action of one cutter may be similarly affected by the operation of the other cutter.
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: January 3, 1995
    Assignee: Baker Hughes Incorporated
    Inventor: Gordon A. Tibbitts
  • Patent number: 4981184
    Abstract: A drag bit for soft formation is disclosed which consists of a new cutting mechanism. The drag bit face forms one or more pairs of radially disposed ridges separated by a valley whereby a leading ridge supports multiple rounded projections and the following ridge supports multiple positive rake angle cutters. The rounded projection elements move aside an elastic earth formation and the separated and trailing cutters clip off the dislodged formation to advance the bit in a borehole.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: January 1, 1991
    Assignee: Smith International, Inc.
    Inventors: R. Helene Knowlton, Michael G. Azar
  • Patent number: 4554986
    Abstract: A rotary drill bit comprising a bit body having a plurality of drag cutting elements mounted on the bottom thereof. Each cutting element has a portion projecting down below the bit body and forward generally in the direction of rotation of the bit. This portion presents a leading face and a trailing face which converge at an acute angle to form a cutting edge. Each element is positioned on the bit body such that its leading and trailing faces present a positive rake angle and back clearance, respectively, to the surface of the well bore formation for improved cutting action. The bit body has an exit port at the bottom thereof for flow of drilling fluid under pressure, and sets of first and second generally parallel ridges defining watercourses extending from the exit port to the periphery of the bit. The cutting elements are mounted on the second or trailing ridge, and extend toward but stop short of the first or leading ridge.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: November 26, 1985
    Assignee: Reed Rock Bit Company
    Inventor: Kenneth W. Jones
  • Patent number: 3995706
    Abstract: A drill of the type comprising a pilot point for locating the drill in a medium to be drilled and cutting means extending from the pilot point and having a radially outermost portion which defines the radius of the hole to be drilled and which precedes a radially inner portion into the medium both axially and radially to promote fracture of the medium laterally of the direction of drilling and thereby to facilitate drill penetration into the medium.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: December 7, 1976
    Assignee: Western Rock Bit Company Limited
    Inventor: Kenneth M. White