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148 条记录 (耗时 0.013 秒)

    Preform cutting elements for rotary drill bits
    99.
    发明公开
    Preform cutting elements for rotary drill bits 有权
    Vergformte元素Drehbohrmeissel

    公开(公告)号：EP0962621A2

    公开(公告)日：1999-12-08

    申请号：EP99303999.9

    申请日：1999-05-24

    申请人： Camco International (UK) Limited

    发明人： Matthias, Terry R.

    IPC分类号： E21B10/56

    CPC分类号： E21B10/55 ,  E21B10/5676 ,  E21B10/573 ,  E21B10/5735 ,  E21B10/602

    摘要： A preform cutting element, for a rotary drag-type drill bit, includes a facing table (120) of superhard material having a front face, a peripheral surface (121), and a rear surface bonded to the front surface of a substrate (119) which is less hard than the superhard material. The facing table (120) extends across only a part of the front surface of the substrate (119), and part of the substrate engages the peripheral surface (121) of the facing table. When such a cutting element is mounted on a bit body with the part of the facing table periphery which is engaged by the substrate being located opposite the cutting edge of the element, the part (127) of the substrate which engages the periphery (121) of the facing table acts as a mechanical support to the facing table so as to resist impact and other loads to which the facing table may be subject in use.

    摘要翻译： 一种用于旋转式拖曳钻头的预成型件切割元件，包括具有前表面，外周表面（121）和与基板（119）的前表面接合的后表面的超硬材料的对置台（120） ），其比超硬材料硬。 面对台（120）仅延伸穿过基板（119）的前表面的一部分，并且基板的一部分接合面对台的外周表面（121）。 当这样的切割元件安装在钻头体上时，面对台周边的与基片相接合的部分位于与元件的切割边缘相对的位置时，基片的与周边121啮合的部分（127） 面对桌子作为机械支撑件作为面对台，以抵抗面对桌子在使用中可能遭受的冲击和其他负载。

    ROLLING CONE BIT WITH WEAR RESISTANT INSERT
    100.
    发明授权
    ROLLING CONE BIT WITH WEAR RESISTANT INSERT 失效
    具有耐磨，切削刀片KEGELROLLENMEISSEL

    公开(公告)号：EP0643792B1

    公开(公告)日：1999-09-08

    申请号：EP93914462.2

    申请日：1993-06-02

    申请人： BAKER HUGHES INCORPORATED

    发明人： SCOTT, Danny, E. ,  SMITH, Redd, H. ,  TIBBITTS, Gordan, A.

    IPC分类号： E21B10/56

    CPC分类号： E21B10/567 ,  B22F7/06 ,  E21B10/52 ,  E21B10/56 ,  E21B10/5676 ,  E21B10/62

    摘要： An improved earth-boring bit of the rolling cone variety (65) and an insert (65, 83, 85) for use therein is provided. A superabrasive element is coated with at least one layer of metallic material (219, 221, 223). The superabrasive element then is placed in a receptacle cavity (215) in a pre-formed hard metal jacket (213). The superabrasive element then is brazed or infiltrated to the hard metal jacket. Metallurgical and mechanical bonds between the superabrasive element, the at least one layer of metallic material on superabrasive element, the braze or infiltrant binder material, and the fracture-tough material of the hard metal jacket retain the superabrasive element in the cavity of the hard metal jacket. Improved earth-boring bits according to this embodiment of the present invention provide abrasion-resistant earth-boring bits of the rolling cutter variety. Such improved bits, and the inserts therefor, are formed without resort to high-temperature, high-pressure processes.