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    DISPLACEMENT MEMBERS AND METHODS OF USING SUCH DISPLACEMENT MEMBERS TO FORM BIT BODIES OF EARTH-BORING ROTARY DRILL BITS
    41.
    发明专利
    DISPLACEMENT MEMBERS AND METHODS OF USING SUCH DISPLACEMENT MEMBERS TO FORM BIT BODIES OF EARTH-BORING ROTARY DRILL BITS 未知

    公开(公告)号：CA2671427C

    公开(公告)日：2015-02-10

    申请号：CA2671427

    申请日：2007-12-07

    Applicant: BAKER HUGHES INC

    Inventor： SMITH REDD H ,  STEVENS JOHN H

    IPC: B22F7/00 ,  B22F3/12 ,  E21B10/00 ,  E21B10/55

    Abstract: Displacement members (68,100,110,120,124) for use in forming a bit body of an earth-boring rotary drill bit include a body having an exterior surface, at least a portion of which is configured to define at least one surface of the bit body as the bit body is formed around the displacement member. In some embodiments, the body may be hollow and/or porous. Methods for forming eai-th-boring rotary drill, bits include positioning such a displacement member in a mold (62,150) and forming a bit body around the displacement member in the mold. Additional methods include pressing a plurality of particles to form a body, forming at least one recess in the body, positioning such a displacement member in the recess, and sintering the body to form a bit body.

    EARTH-BORING ROTARY DRILL BITS INCLUDING BIT BODIES HAVING BORON CARBIDE PARTICLES IN ALUMINUM OR ALUMINUM-BASED ALLOY MATRIX MATERIALS, AND METHODS FOR FORMING SUCH BITS
    42.
    发明专利
    EARTH-BORING ROTARY DRILL BITS INCLUDING BIT BODIES HAVING BORON CARBIDE PARTICLES IN ALUMINUM OR ALUMINUM-BASED ALLOY MATRIX MATERIALS, AND METHODS FOR FORMING SUCH BITS 未知

    公开(公告)号：CA2668192C

    公开(公告)日：2012-05-15

    申请号：CA2668192

    申请日：2007-09-28

    Applicant: BAKER HUGHES INC

    Inventor： CHOE HEMAN ,  STEVENS JOHN H ,  WESTHOFF JAMES C ,  EASON JIMMY W ,  OVERSTREET JAMES L

    IPC: E21B10/42 ,  E21B10/50 ,  E21B10/54

    Abstract: Rotary drill bits (10) for drilling subterranean formations include a bit body (12) and at least one cutting structure (34) disposed on a face (18) thereof. The bit body includes a crown region (14) comprising a particle-matrix composite material (52) that includes a plurality of boron carbide particles (50) dispersed throughout an aluminum or aluminum-based alloy matrix material. In some embodiments, the matrix material may include a continuous solid solution phase and a discontinuous precipitate phase. Methods of manufacturing rotary drill bits for drilling subterranean formations include infiltrating a plurality of boron carbide particles with a molten aluminum or aluminum-based material. In additional methods, a green powder component is provided that includes a plurality of particles each comprising boron carbide and a plurality of particles each comprising aluminum or an aluminum-based alloy material. The green powder component is at least partially sintered to provide a bit body, and a shank is attached to the bit body.

    EARTH-BORING ROTARY DRILL BITS AND METHODS OF FORMING EARTH-BORING ROTARY DRILL BITS
    43.
    发明专利
    EARTH-BORING ROTARY DRILL BITS AND METHODS OF FORMING EARTH-BORING ROTARY DRILL BITS 未知

    公开(公告)号：CA2630917C

    公开(公告)日：2011-08-02

    申请号：CA2630917

    申请日：2006-11-10

    Applicant: BAKER HUGHES INC

    Inventor： OXFORD JAMES A ,  EASON JIMMY W ,  SMITH REDD H ,  STEVENS JOHN H ,  LYONS NICHOLAS J

    IPC: E21B10/00 ,  B22F7/06 ,  E21B10/62

    Abstract: Methods of forming earth-boring rotary drill bits (50) include providing a bit body (52), providing a shank(70) that is configured for attachment to a drill string, and attaching the shank to the bit body. Providing a bit body includes providing a green powder component having a first region (54) having a first composition and a second region (56) having a second, different composition, and at least partially sintering the green powder component. Other methods include providing a powder mixture, pressing the powder mixture to form a green component, and sintering the green component to a final density. A shank(70) is provided that includes an aperture (72), and a feature(60) is machined in a surface of the bit body. The aperture is aligned with the feature, and a retaining member (80) is inserted through the aperture. An earth-boring bit includes a bit body comprising a particle-matrix composite material including a plurality of hard particles dispersed throughout a matrix material. A shank is attached to the bit body using a retaining member.

    METHOD OF FORMING POCKETS FOR RECEIVING DRILL BIT CUTTING ELEMENTS
    46.
    发明专利
    METHOD OF FORMING POCKETS FOR RECEIVING DRILL BIT CUTTING ELEMENTS 未知

    公开(公告)号：CA2679749A1

    公开(公告)日：2008-09-18

    申请号：CA2679749

    申请日：2008-03-12

    Applicant: BAKER HUGHES INC

    Inventor： SMITH REDD H ,  DUGGAN JAMES L ,  STEVENS JOHN H

    IPC: E21B10/573 ,  E21B10/55

    Abstract: Methods of forming cutting element pockets in earth-boring tools include machining at least one recess (52) to define at least one surface of a cutti ng element pocket using a cutter (56) oriented at an angle to a longitudinal axis of the cutting element pocket. Methods of forming earth-boring tools i nclude forming a bit body (50) and forming at least one cutting element pock et therein using a rotating cutter oriented at an angle relative to a longit udinal axis (60) of the cutting element pocket being formed. Earth-boring to ols have a bit body comprising a first surface defining a lateral sidewall ( 55) of a cutting element pocket, a second surface defining an end wall (66) of the cutting element pocket, and another surface defining a groove located between the first and second surfaces that extends into the body to enable a cutting element (18) to abut against an area of the lateral sidewall and e nd wall of the pocket.

    DISPLACEMENT MEMBERS AND METHODS OF USING SUCH DISPLACEMENT MEMBERS TO FORM BIT BODIES OF EARTH BORING ROTARY DRILLS BITS
    47.
    发明专利
    DISPLACEMENT MEMBERS AND METHODS OF USING SUCH DISPLACEMENT MEMBERS TO FORM BIT BODIES OF EARTH BORING ROTARY DRILLS BITS 未知

    公开(公告)号：CA2671427A1

    公开(公告)日：2008-06-19

    申请号：CA2671427

    申请日：2007-12-07

    Applicant: BAKER HUGHES INC

    Inventor： STEVENS JOHN H ,  SMITH REDD H

    IPC: B22F7/00 ,  B22F3/12 ,  E21B10/00 ,  E21B10/55

    Abstract: Displacement members (68,100,110,120,124) for use in forming a bit body o f an earth-boring rotary drill bit include a body having an exterior surface , at least a portion of which is configured to define at least one surface o f the bit body as the bit body is formed around the displacement member. In some embodiments, the body may be hollow and/or porous. Methods for forming eai-th-boring rotary drill, bits include positioning such a displacement mem ber in a mold (62,150) and forming a bit body around the displacement member in the mold. Additional methods include pressing a plurality of particles t o form a body, forming at least one recess in the body, positioning such a d isplacement member in the recess, and sintering the body to form a bit body.

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