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    Polycrystalline diamond constructions having improved thermal stability
    45.
    发明专利
    Polycrystalline diamond constructions having improved thermal stability 未知

    公开(公告)号：IE86199B1

    公开(公告)日：2013-06-05

    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: C04B41/88 ,  C01B31/00 ,  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.

    DEEP LEACH VESSEL FOR SHEAR CUTTERS
    46.
    发明专利
    DEEP LEACH VESSEL FOR SHEAR CUTTERS 未知

    公开(公告)号：ZA201201610B

    公开(公告)日：2012-11-28

    申请号：ZA201201610

    申请日：2012-03-02

    Applicant: SMITH INTERNATIONAL

    Inventor： BELNAP J DANIEL ,  CORBETT LOEL ,  CARIVEAU PETER THOMAS ,  EYRE RONALD K

    IPC: B01J20060101 ,  B23D20060101

    Abstract: A system for producing thermally stable cutting elements may include a heat source, a pressure vessel, at least one polycrystalline diamond body attached to a carbide substrate, and a leaching agent is disclosed, wherein the heat source includes a container comprising at least one receiving mechanism and at least one retention mechanism, and wherein the carbide substrate is disposed in the at least one receiving mechanism of the pressure vessel, and wherein the leaching agent is disposed in the pressure vessel, and wherein the leaching agent removes the catalyzing material from the interstitial spaces interposed between the diamond particles of the at least one polycrystalline diamond body, and wherein the at least one retention mechanism of the pressure vessel seals at least a portion of the carbide substrate into the at least one receiving mechanism and prevents the leaching agent from contacting at least a portion of the carbide substrate.

    Thermally stable diamond polycrystalline diamond constructions
    48.
    发明专利
    Thermally stable diamond polycrystalline diamond constructions 未知

    公开(公告)号：IE20110187A1

    公开(公告)日：2011-07-20

    申请号：IE20110187

    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 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 0.02mm 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.

    A polycrystalline diamond body whose surface is free of group VIII metals
    49.
    发明专利
    A polycrystalline diamond body whose surface is free of group VIII metals 未知

    公开(公告)号：GB2464863A

    公开(公告)日：2010-05-05

    申请号：GB201001690

    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, a side surface 58, and a beveled surface 54 therebetween. 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, side, and beveled surface 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.

    Controlling the quality of ultra-hard materials
    50.
    发明专利
    Controlling the quality of ultra-hard materials 未知

    公开(公告)号：GB2420564A

    公开(公告)日：2006-05-31

    申请号：GB0524385

    申请日：2005-11-30

    Applicant: SMITH INTERNATIONAL

    Inventor： YU FENG ,  CORBETT LOEL ,  EYRE RONALD K

    IPC: B22F7/02

    Abstract: A method for controlling the consistency of the quality of ultra hard materials formed over tungsten carbide substrates formed from different batches of tungsten carbide powder by controlling the tungsten carbide particle size distribution in each batch. The deviation of particle size distribution between different batches having no more than 30Y. Such control ensures similar infiltration kinetics of cobalt into the tungsten carbide substrates.

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