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    Selectively Leached, Polycrystalline Structures for Cutting Elements of Drill Bits
    2.
    发明申请
    Selectively Leached, Polycrystalline Structures for Cutting Elements of Drill Bits 审中-公开
    选择性浸出，钻头切割元素的多晶结构

    公开(公告)号：US20140069726A1

    公开(公告)日：2014-03-13

    申请号：US14019013

    申请日：2013-09-05

    申请人： Ulterra Drilling Technologies, L.P.

    发明人： Matthew Douglas Mumma ,  Andrew David Murdock ,  John Martin Clegg ,  William Henry DuBose ,  Neal Alan Bowden

    IPC分类号： B24D18/00 ,  E21B10/55 ,  E21B10/573

    CPC分类号： B24D18/0009 ,  B24D99/005 ,  C04B35/528 ,  C04B2235/3813 ,  C04B2235/3826 ,  C04B2235/386 ,  C04B2235/427 ,  E21B10/55 ,  E21B10/5735

    摘要： The rate of leaching of a polycrystalline diamond (PCD) cutting layer for cutting elements or other wear parts is varied by introduction into the PCD of an additive prior to leaching. Selective introduction of the additive into one or more regions of a PCD cutting structure allows controlling leaching rates of selective leaching of parts of the PCD structure, which allows for creating of a boundary between the leached and non-leached regions of a PCD structure to be made so that is not parallel to the surface or surfaces exposed to the leaching solution. The additive is comprised of a material that increases the permeability of the PCD or acceptance of the PCD to the leaching solution, such as a hydrophile.

    摘要翻译： 用于切割元件或其他磨损部件的多晶金刚石（PCD）切割层的浸出速率通过在浸出之前引入添加剂的PCD而变化。 将添加剂选择性地引入到PCD切割结构的一个或多个区域中允许控制PCD结构部分的选择性浸出的浸出速率，这允许在PCD结构的浸出和非浸出区域之间形成边界 使其不平行于暴露于浸出溶液的表面或表面。 添加剂由增加PCD的渗透性或PCD对浸出溶液（例如亲水剂）的接受性的材料组成。

    Diamond Cutting Elements for Drill Bits Seeded With HCP Crystalline Material
    4.
    发明申请
    Diamond Cutting Elements for Drill Bits Seeded With HCP Crystalline Material 审中-公开
    用HCP结晶材料种植的钻头钻石切割元件

    公开(公告)号：US20140332286A1

    公开(公告)日：2014-11-13

    申请号：US13891040

    申请日：2013-05-09

    申请人： ULTERRA DRILLING TECHNOLOGIES, L.P.

    发明人： Andrew David Murdock ,  Matthew Douglas Mumma ,  John Martin Clegg ,  William Henry DuBose ,  Neal Alan Bowden

    IPC分类号： E21B10/567 ,  B24D18/00 ,  B24D3/10

    CPC分类号： E21B10/567 ,  B24D3/10 ,  B24D18/00 ,  B24D99/005 ,  E21B10/46 ,  E21B10/55 ,  E21B10/56 ,  E21B10/5676 ,  E21B2010/563 ,  E21B2010/564

    摘要： A polycrystalline diamond compact (PDC), which is attached or bonded to a substrate to form a cutter for a drill bit, is comprised of sintered polycrystalline diamond interspersed with a seed material which has a hexagonal close packed (HCP) crystalline structure. A region of the sintered polycrystalline diamond structure, near one or more of its working surfaces, which has been seeded with an HCP seed material prior to sintering, is leached to remove catalyst. Selectively seeding portions or regions of a sintered polycrystalline diamond structure permits differing leach rates to form leached regions with differing distances or depths and geometries.

    摘要翻译： 附着或结合到基底以形成钻头切割器的多晶金刚石压块（PDC）由散布有具有六方密堆积（HCP）晶体结构的种子材料的烧结多晶金刚石组成。 烧结多晶金刚石结构的一个区域，在其一个或多个工作表面附近，其在烧结之前已经用HCP种子材料接种，以除去催化剂。 烧结多晶金刚石结构的选择性接种部分或区域允许不同的浸出速率形成具有不同距离或深度和几何形状的浸出区域。