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    ULTRAHARD COMPOSITE CONSTRUCTIONS
    3.
    发明专利
    ULTRAHARD COMPOSITE CONSTRUCTIONS 未知

    公开(公告)号：CA2537726C

    公开(公告)日：2013-08-06

    申请号：CA2537726

    申请日：2006-02-24

    Applicant: SMITH INTERNATIONAL

    Inventor： BELNAP JOHN DANIEL ,  GRIFFO ANTHONY ,  EYRE RONALD K ,  MIDDLEMISS STEWART N

    IPC: C04B35/5835 ,  B32B18/00 ,  C04B35/5831 ,  C04B35/64 ,  E21B10/46

    Abstract: Ultrahard composite constructions comprise a plurality of first phases dispersed within a matrix second phase, wherein each can comprise an ultrahard material including PCD, PcBN, and mixtures thereof. The constructions are formed from a plurality of granules that are combined and sintered at HP/HT conditions. The granules include a core surrounded by a shell and both are formed from an ultrahard material or precursor comprising an ultrahard constituent for forming the ultrahard material. When sintered, the cores form the plurality of first phases, and the shells form at least a portion of the second phase. The ultrahard material used to form the granule core may have an amount of ultrahard constituent different from that used to form the granule shell to provide desired different properties. The ultrahard constituent in the granule core and shell can have approximately the same particle size.

    Thermally stable diamond polycrystalline diamond constructions
    4.
    发明专利
    Thermally stable diamond polycrystalline diamond constructions 未知

    公开(公告)号：IE86188B1

    公开(公告)日：2013-05-22

    申请号：IE20050623

    申请日：2005-09-20

    Applicant: SMITH INTERNATIONAL

    Inventor： EYRE RONALD K ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY

    IPC: E21B10/46 ,  B22F7/06 ,  E21B10/567

    Abstract: Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals and interstitial regions disposed among the crystals. A metallic substrate is attached to the diamond body. A working surface is positioned along an outside portion of the diamond body, and the diamond body comprises a first region that is substantially free of a catalyst material that extends a partial depth from a surface into the body, and a second region that includes the catalyst material. The diamond body first region extends from the working surface to depth of at least about 0.02 mm to a depth of less than about 0.09 mm. The diamond body includes diamond crystals having an average diamond grain size of greater than about 0.02 mm, and comprises at least 85 percent by volume diamond based on the total volume of the diamond body. The body can include natural diamond grains and/or a blend of natural and synthetic diamond grains, and is treated to form the first region. Before treatment, a portion of the body to be treated is finished to an approximate final dimension so that the depth of the first region of the finished product is substantially the same as when treated. During treatment, catalyst materials as well as non-catalyst metallic materials are removed from the diamond body to provide a further enhanced degree of thermal stability.

    Thermally stable diamond polycrystalline diamond constructions
    5.
    发明专利
    Thermally stable diamond polycrystalline diamond constructions 未知

    公开(公告)号：IE20120262A1

    公开(公告)日：2013-05-22

    申请号：IE20120262

    申请日：2005-09-20

    Applicant: SMITH INTERNATIONAL

    Inventor： EYRE RONALD K ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY

    IPC: E21B1/00 ,  B22F7/00 ,  C22C26/00

    Abstract: Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals. A metallic substrate is attached to the diamond body. A working surface is positioned along an outside portion of the diamond body, and the diamond body comprises a first region that is substantially free of a catalyst material that extends a partial depth from a surface into the body, and a second region that includes the catalyst material. The diamond body first region extends from the working surface to depth of at least about 0.02 mm to a depth of less than about 0.09 mm. The diamond body includes diamond crystals having an average diamond grain size of greater than about 0.02mm, and comprises at least 85 percent by volume diamond based on the total volume of the diamond body. The body can include natural diamond grains and/or a blend of natural and synthetic diamond grains, and is treated to form the first region. Before treatment, a portion of the body to be treated is finished to an approximate final dimension so that the depth of the first region of the finished product is substantially the same as when treated. During treatment, catalyst materials as well as non-catalyst metallic materials are removed from the diamond body to provide a further enhanced degree of thermal stability.

    Thermally stable diamond polycrystalline diamond constructions
    6.
    发明专利
    Thermally stable diamond polycrystalline diamond constructions 未知

    公开(公告)号：IE20110190A1

    公开(公告)日：2011-07-20

    申请号：IE20110190

    申请日：2005-09-20

    Applicant: SMITH INTERNATIONAL

    Inventor： OLDHAM THOMAS W ,  GRIFFO ANTHONY ,  EYRE RONALD K

    IPC: B22F7/00 ,  C22C26/00 ,  E21B1/00

    Abstract: Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals and interstitial rehions disposed among the crystals. A metallic substrate is attached to the diamond body. A working surface is positioned along an outside portion of the diamond body, and the diamond body comprises a first region that is substantially free of a catalyst material that extends a partial depth from a surface into the body, and a second region that includes the catalyst material. The diamond body first region extends from the working surface to depth of at least about 0.02mm to a depth of less than about 0.09mm. The diamond body includes diamond crystals having an average diamond grain size of greater than about 0.02mm, and comprises at least 85 percent by volume diamond based on the total volume of the diamond body. The body can include natural diamond grains and/or a blend of natural and synthetic diamond grains, and is treated to form the first region. Before treatment, a portion of the body to be treated is finished to an approximate final dimension so that the depth of the first region of the finished product is substantially the same as when treated. During treatment, catalyst materials as well as non-catalyst metallic materials are removed from the diamond body to provide a further enhanced degree of thermal stability.

    Thermally stable cutting element and method and system for forming such elements
    8.
    发明专利
    Thermally stable cutting element and method and system for forming such elements 未知

    公开(公告)号：IE20100105A1

    公开(公告)日：2010-05-26

    申请号：IE20100105

    申请日：2008-02-06

    Applicant: SMITH INTERNATIONAL

    Inventor： GRIFFO ANTHONY ,  KESHAVAN MADAPUSI K

    IPC: B01J3/06 ,  E21B10/46

    Abstract: A method of forming a thermally stable cutting element involves forming a PCD body 32 of interconnected diamond particles with a catalyst material disposed in the interstitial spaces interposed between the diamond particles. The diamond particles form at least 85% by volumet of the body 32. Substantially all the catalyst material is removed from the body 32 and the body 32 is attached to a carbide substrate by sintering. The diamond particles have an average grain size of less than 20 microns.

    A polycrystalline diamond body whose surface is free of group VIII metals
    9.
    发明专利
    A polycrystalline diamond body whose surface is free of group VIII metals 未知

    公开(公告)号：GB2464865A

    公开(公告)日：2010-05-05

    申请号：GB201001698

    申请日：2005-09-21

    Applicant: SMITH INTERNATIONAL

    Inventor： EYRE RONALD K ,  OLDHAM THOMAS W ,  GRIFFO ANTHONY

    IPC: E21B10/46 ,  B22F7/00 ,  B22F7/06 ,  C22C26/00 ,  E21B10/567

    Abstract: A polycrystalline diamond body 57 has a top surface 52 and a side surface 58. The body is made from bonded diamond crystals. The body is attached to a substrate 60. There is a region 56 where the gaps between the crystals are free of a group VIII metal. There is another region where the gaps between the crystals contain a group VIII metal. The region free of the metal may extend over various sections of the top and side surfaces of the body; it may be in the region of 0.04-0.08mm deep. The separate regions can be formed by treating only a portion of a body whose gaps initially all contain the metal. Leaching is one such treatment. The group VIII transition metal could be a catalyst for sintering the diamond crystals.

    Polycrystalline diamond constructions having improved thermal stability
    10.
    发明专利
    Polycrystalline diamond constructions having improved thermal stability 未知

    公开(公告)号：IE20080214A1

    公开(公告)日：2008-12-10

    申请号：IE20080214

    申请日：2008-03-20

    Applicant: SMITH INTERNATIONAL

    Inventor： EYRE RONALD K ,  GRIFFO ANTHONY ,  CARIVEAU PETER THOMAS ,  KESHAVAN MADAPUSI K

    IPC: B01J3/06 ,  C01B31/00 ,  C04B41/88 ,  C04B41/91 ,  E21B10/46

    Abstract: Polycrystalline diamond (PCD) constructions include a PCD body comprising a polycrystalline matrix region, a first region that includes a replacement material positioned remote from a body surface, and a second region that is substantially free of the replacement material and that extends a depth from the body surface. The PCD construction can further include a substrate that is attached to the body. The PCD body is formed by removing a solvent catalyst material used to form the body, replacing the removed solvent catalyst material with a replacement material, and then removing the replacement material from a region of the body to thereby form the second region. The replacement material can be introduced into the PCD body during a HPHT process, and the substrate may or may not be the source of the noncatalyzing material.

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