公开(公告)号：WO2013170083A1

公开(公告)日：2013-11-14

申请号：PCT/US2013/040422

申请日：2013-05-09

Applicant: ULTERRA DRILLING TECHNOLOGIES, L.P.

Inventor： MURDOCK, Andrew, David ,  MUMMA, Matthew Douglas ,  CLEGG, John Martin ,  DUBOSE, William Henry ,  BOWDEN, Neal Alan

IPC: E21B10/46 ,  E21B10/567

CPC classification number: E21B10/567 ,  B32B18/00 ,  C04B35/528 ,  C04B2235/3826 ,  C04B2235/386 ,  C04B2235/427 ,  C04B2235/5436 ,  C04B2235/5454 ,  C04B2235/75 ,  C04B2237/363 ,  C04B2237/588 ,  C22C26/00 ,  C22C2026/008

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2014039649A1

公开(公告)日：2014-03-13

申请号：PCT/US2013/058222

申请日：2013-09-05

Applicant: ULTERRA DRILLING TECHNOLOGIES, L.P.

Inventor： MUMMA, Matthew Douglas ,  MURDOCK, Andrew David ,  CLEGG, John Martin ,  DUBOSE, William Henry ,  BOWDEN, Neal Alan

IPC: C30B28/00 ,  C30B29/04 ,  E21B10/46

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

Abstract: 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.

Abstract translation: 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。