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    FUNCTIONALLY LEACHED PCD CUTTER
    3.
    发明公开
    FUNCTIONALLY LEACHED PCD CUTTER 有权
    功能浸出PCD刀具

    公开(公告)号：EP2609276A2

    公开(公告)日：2013-07-03

    申请号：EP11820455.1

    申请日：2011-08-22

    申请人： Varel Europe S.A.S.

    发明人： BELLIN, Federico

    IPC分类号： E21B10/56 ,  B24D18/00

    CPC分类号： E21B10/5676

    摘要： A cutting table includes a cutting surface, an opposing surface, a cutting table outer wall, and one or more slots. The cutting table outer wall extends from the circumference of the opposing surface to the circumference of the cutting surface. The slots extend from a portion of the cutting surface to a portion of the cutting table outer wall. The cutting table is leached to form a thermally stable cutting table. One or more slots are positioned in parallel with at least another slot in some embodiments. In some embodiments, the slots are positioned circumferentially around the cutting surface. In some embodiments, at least one slot is backfilled with a backfilling material to increase heat transfer or impact resistance. In some embodiments, the cutting table is coupled to a substrate to form a cutter. The slots are formed either after or during the formation of the cutting table.

    CUTTING ELEMENT FOR USE IN A DRILL BIT FOR DRILLING SUBTERRANEAN FORMATIONS
    6.
    发明公开
    CUTTING ELEMENT FOR USE IN A DRILL BIT FOR DRILLING SUBTERRANEAN FORMATIONS 审中-公开
    切割元件用在孔钻头地下岩层

    公开(公告)号：EP2430279A2

    公开(公告)日：2012-03-21

    申请号：EP10775271.9

    申请日：2010-05-04

    申请人： Baker Hughes Incorporated

    发明人： DOVALINA, Jorge

    IPC分类号： E21B10/54 ,  E21B10/62 ,  E21B10/42

    CPC分类号： E21B10/5676

    摘要： A cutting element for use in a drill bit for drilling subterranean formations including a substrate having a body including an upper surface extending transversely to a longitudinal axis of the body, a superabrasive layer overlying the upper surface of the substrate, wherein the superabrasive layer includes an annular shape having a central opening defined by an inner surface. The cutting element further includes an abrasive insert overlying the upper surface of the substrate and disposed within the central opening of the superabrasive layer, wherein the abrasive insert has an upper surface having a surface roughness (Ra) of greater than about 1 micron.

    COMPOSITE TOOL INSERT
    10.
    发明公开
    COMPOSITE TOOL INSERT 有权
    复合工具使用

    公开(公告)号：EP1579103A1

    公开(公告)日：2005-09-28

    申请号：EP03809805.9

    申请日：2003-09-12

    申请人： ELEMENT SIX (PTY) LTD

    发明人： TANK, Klaus,9 Warbleton Avenue ,  CHAPMAN, Raymond, Albert,183 Columbine Avenue ,  ACHILLES, Roy, Derrick,608 San Martinho

    IPC分类号： E21B10/56 ,  E21B29/06

    CPC分类号： E21B10/5676 ,  E21B29/06 ,  Y10T407/19

    摘要： A tool insert comprises a substrate (10) having a support surface and a support ring extending laterally from the support surface. The support ring is sized to define a recess (14) within the confines thereof and a shelf about the periphery thereof. A layer (12) of ultra-hard abrasive material is located within the recess and bonded to the substrate and the support ring (16), and presents a primary cutting edge (22) for the tool insert. A protective layer (18) is bonded to the shelf about the support ring so as to protect the primary cutting edge. The protective layer provides a secondary cutting edge (20) for the tool insert, the depth of the protective layer being selected so as to be sufficient to protect the primary cutting edge whilst cutting, milling or drilling through a first substance but to expose the primary cutting edge upon encountering a second substance.