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    Rotary drag bit having rotationally raked or angled blades and gauge pads
    11.
    发明专利
    Rotary drag bit having rotationally raked or angled blades and gauge pads 未知

    公开(公告)号：GB2355035A

    公开(公告)日：2001-04-11

    申请号：GB0022494

    申请日：2000-09-13

    Applicant: BAKER HUGHES INC

    Inventor： SINOR L ALLEN

    IPC: E21B10/54 ,  E21B10/55 ,  E21B10/56 ,  E21B10/573 ,  E21B10/60 ,  E21B17/10 ,  E21B10/26

    Abstract: A rotary drag or abrasive drill bit 10 includes a bit body 12 having blades 14 and gauge pads 40 raked or angled forwardly in the direction of bit rotation in an auger-like configuration. The space between adjacent blades defines drilling fluid circulation channels 18, a nozzle 60C being provided in each channel, and the space between adjacent gauge pads defines junk slots 44 for drilling cuttings removal. Each blade includes a superabrasive cutting structure preferably in the form of superabrasive cutters 100 comprising a superabrasive table (102, figure 4B) supported by a substrate (104, figure 4B). Advantageously, the gauge pads are configured, in combination with a portion of the bit body, to act as an impeller when the bit is rotated, thus enhancing the removal of cuttings from the bit face.

    Drill bit with controlled cutter loading and depth of cut
    12.
    发明专利
    Drill bit with controlled cutter loading and depth of cut 未知

    公开(公告)号：GB2353548A

    公开(公告)日：2001-02-28

    申请号：GB0020134

    申请日：2000-08-16

    Applicant: BAKER HUGHES INC

    Inventor： TIBBITTS GORDON A ,  HANSEN WAYNE R ,  COOLEY CRAIG H ,  SINOR L ALLEN ,  DYKSTRA MARK W

    IPC: E21B10/42 ,  E21B10/43 ,  E21B10/46 ,  E21B10/56 ,  E21B10/573 ,  E21B12/04 ,  E21B10/00

    Abstract: A rotary drag bit 10 comprises cutters 14 mounted in blades 18 that extend above the face 12. The blades comprise exterior features such as arcuate bearing segments 30a-30f mounted either on the blades or as a bridge between them. The arcuate bearing segments precede, taken in the direction of bit rotation, the cutters with which they are associated and provide sufficient bearing area so as to support the bit against the bottom of a borehole under weight on bit without exceeding the compressive strength of the formation being drilled. The bearing segment may be provided with wear-resistant elements or inserts 32 to reduce the abrasive wear thereof as the bit rotates under applied torque. Alternatively the bearing segment comprises a wear-resistant surface covering. The exterior features may be oriented and configured to function optimally at a predicted rate of penetration, or range of rates, at which the bit is operated.

    13.
    发明专利
    未知

    公开(公告)号：ITTO20000925D0

    公开(公告)日：2000-10-05

    申请号：ITTO20000925

    申请日：2000-10-05

    Applicant: BAKER HUGHES INC

    Inventor： SINOR L ALLEN

    IPC: E21B10/54 ,  E21B10/55 ,  E21B10/56 ,  E21B10/573 ,  E21B10/60 ,  E21B17/10

    Abstract: A fixed cutter, or rotary drag, bit for drilling subterranean formations, exhibiting an enhanced resistance to bit balling and an improved rate of penetration. The bit includes an auger-like blade configuration, wherein positively raked, relatively tall blades lean rotationally forward to provide increased clearance and volume between the bit face and the formation to facilitate removal of cuttings coming off the tops of the cutters from the bit face. The blades are each substantially contiguous with an elongated, helical gage pad raked rotationally forwardly in the manner of the blades, the longitudinal lengths of the gage pads and the radially outer edges of the blades in combination with their slope providing a stabilizing structure which substantially completely circumferentially encompasses the bit body. The slope or pitch of the helix angle of the blade edges and gage pads may be varied as desired to optimize hydraulic efficiency, cutter requirements of directional drilling, and stability needs. The bit also includes nozzles positioned on the bit face and aimed toward the face of a blade following each respective nozzle to improve cleaning of the blades and to improve the hydraulic energy and fluid velocities along the gage. The bit also preferably includes aggressively raked superabrasive cutters having a ground relief on the substrate supporting the diamond table rotationally behind the table to minimize contact of the substrate material with the formation.

    DRILL BIT WITH CONTINOUSLY SHARP EDGE CUTTING ELEMENTS
    16.
    发明申请
    DRILL BIT WITH CONTINOUSLY SHARP EDGE CUTTING ELEMENTS 审中-公开
    具有连续夏普切割元素的钻头

    公开(公告)号：WO2010045167A3

    公开(公告)日：2010-07-01

    申请号：PCT/US2009060408

    申请日：2009-10-13

    Applicant: BAKER HUGHES INC ,  WELCH ROBERT M ,  MCCLAIN ERIC E ,  SINOR L ALLEN

    Inventor： WELCH ROBERT M ,  MCCLAIN ERIC E ,  SINOR L ALLEN

    IPC: E21B10/46 ,  E21B10/48

    CPC classification number: E21B10/43

    Abstract: A method of optimizing drill bit design and an optimized drill bit for drilling a well into an earth formation comprising a bit body; a number of blades spaced around the bit body, each blade having a curved outer edge and a forward face; a first row of cutter pockets recessed into the face along the outer edge of each blade; a second group of cutter pockets recessed into the face of each blade offset from the first row; and a plurality of cutting elements, each cutting element being brazed into a different one of the cutter pockets.

    Abstract translation: 一种优化钻头设计的方法和用于将井钻入包括钻头体的地层中的优化钻头; 围绕钻头体间隔开的多个刀片，每个刀片具有弯曲的外边缘和前表面; 沿着每个叶片的外边缘凹入到所述面中的第一排刀槽; 第二组切割器凹槽凹入到从第一排偏移的每个叶片的表面中; 和多个切割元件，每个切割元件被钎焊到不同的一个刀具凹口中。

    DRILLING TOOL EQUIPPED WITH IMPROVED CUTTING ELEMENT LAYOUT TO REDUCE CUTTER DAMAGE THROUGH FORMATION CHANGES, METHODS OF DESIGN THEREOF AND DRILLING THEREWITH
    17.
    发明专利
    DRILLING TOOL EQUIPPED WITH IMPROVED CUTTING ELEMENT LAYOUT TO REDUCE CUTTER DAMAGE THROUGH FORMATION CHANGES, METHODS OF DESIGN THEREOF AND DRILLING THEREWITH 未知

    公开(公告)号：CA2598428C

    公开(公告)日：2010-10-26

    申请号：CA2598428

    申请日：2006-02-22

    Applicant: BAKER HUGHES INC

    Inventor： SINOR L ALLEN ,  OLDHAM JACK T

    IPC: E21B10/42 ,  E21B10/26

    Abstract: A drilling tool including at least two cutting elements (212B) (e.g., redundant or upon a selected profile region) sized, positioned, and configured thereon so as to contact or encounter a change (261) in at least one drilling characteristic of subterranean formation (260) 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 (212B) upon the cutting element profile in relation to a predicted boundary surface (261) 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.

    DRILL BIT WITH CONTINUOUSLY SHARP EDGE CUTTING ELEMENTS
    18.
    发明专利
    DRILL BIT WITH CONTINUOUSLY SHARP EDGE CUTTING ELEMENTS 未知

    公开(公告)号：CA2740218A1

    公开(公告)日：2010-04-22

    申请号：CA2740218

    申请日：2009-10-13

    Applicant: BAKER HUGHES INC

    Inventor： WELCH ROBERT M ,  MCCLAIN ERIC E ,  SINOR L ALLEN

    IPC: E21B10/46 ,  E21B10/48

    Abstract: A method of optimizing drill bit design and an optimized drill bit for drilling a well into an earth formation comprising a bit body; a number of blades spaced around the bit body, each blade having a curved outer edge and a forward face; a first row of cutter pockets recessed into the face along the outer edge of each blade; a second group of cutter pockets recessed into the face of each blade offset from the first row; and a plurality of cutting elements, each cutting element being brazed into a different one of the cutter pockets.

    19.
    发明专利
    未知

    公开(公告)号：ITTO20000816A1

    公开(公告)日：2002-02-25

    申请号：ITTO20000816

    申请日：2000-08-25

    Applicant: BAKER HUGHES INC

    Inventor： TIBBITTS GORDON A ,  HANSEN WAYNE R ,  COOLEY CRAIG H ,  SINOR L ALLEN ,  DYKSTRA MARK W

    IPC: E21B10/42 ,  E21B10/43 ,  E21B10/46 ,  E21B10/56 ,  E21B10/573 ,  E21B12/04

    Abstract: A rotary drag bit including exterior features to control the depth of cut by cutters mounted thereon, so as to control the volume of formation material cut per bit rotation as well as the torque experienced by the bit and an associated bottomhole assembly. The exterior features preferably precede, taken in the direction of bit rotation, cutters with which they are associated, and provide sufficient bearing area so as to support the bit against the bottom of the borehole under weight on bit without exceeding the compressive strength of the formation rock. The exterior features may be oriented and configured to function optimally at a predicted rate of penetration, or range of rates, at which the bit may be operated, such rate or rates being further optionally maximized in softer formations in light of the ability of the bit to hydraulically clear a maximum volume of formation cuttings to prevent so-called bit balling.

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