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    Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities
    1.
    发明公开
    Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities 失效
    Superharte SchneidstrukturfürErdbohrungen mit verbesserter Steifheit undWärmeleitfähigkeit

    公开(公告)号：EP0716215A2

    公开(公告)日：1996-06-12

    申请号：EP95118382.1

    申请日：1995-11-22

    申请人： BAKER HUGHES INCORPORATED

    发明人： Cooley, Craig H. ,  Tibbitts, Gordon A. ,  Hansen, Wayne R.

    IPC分类号： E21B10/56 ,  E21B10/60

    CPC分类号： E21B10/43 ,  E21B10/55 ,  E21B10/567 ,  E21B10/5735 ,  E21B10/60

    摘要： A cutting element for a rotary drill bit for subterranean drilling, including a substantially planar table of superhard material having a cutting face and a cutting edge. The table may be reinforced against bending with one or more strut portions extending from the rear of the table to the rear of the substrate and at least partially across the cutting element. The strut portions may be integral with the diamond table, or separately fabricated and of another material. The strut portions, in addition to or in lieu of providing stiffness to the superhard table, may also serve to enhance heat transfer away from the cutting face and cutting edge of the superhard table. The structure supporting the cutting element on the drill bit and the body of the drill bit itself may be additionally configured to include structures to facilitate heat transfer away from the superhard table.

    摘要翻译： 一种用于地下钻孔的旋转钻头的切割元件，包括具有切割面和切割刃的超硬材料的基本平坦的台面。 桌子可以通过从桌子的后部延伸到基底的后部并且至少部分地跨越切割元件的一个或多个支柱部分而被加强。 支柱部分可以与金刚石台一体，或者单独制造和另一种材料。 支撑部分除了或代替为超硬桌子提供刚度之外，还可用于增强离开超硬桌子的切割面和切割边缘的热传递。 支撑钻头上的切割元件的结构和钻头本身的主体可以被额外地构造成包括便于远离超硬表的热传递的结构。

    Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations
    3.
    发明公开
    Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations 失效
    钻头以及用于降低流体的入射到形成以及增加钻探塑料地层方法。

    公开(公告)号：EP0532869A1

    公开(公告)日：1993-03-24

    申请号：EP92112961.5

    申请日：1992-07-29

    申请人： BAKER HUGHES INCORPORATED

    发明人： Tibbitts, Gordon A. ,  Cooley, Craig H.

    IPC分类号： E21B10/60

    CPC分类号： E21B10/43 ,  E21B7/00 ,  E21B10/00 ,  E21B10/46 ,  E21B10/60

    摘要： A drill bit and method in which polycrystalline diamond cutters mounted on a bit crown cut formation chips akin to the manner in which a grater cuts cheese. Chips in impermeable or plastic formations are extruded by the cutters into cavities internal to the bit via slots adjacent each cutter. Drilling fluid circulates internally of the bit from the drill string and into the annulus above that portion of the bit bearing cutters. In one embodiment, the portion of the bit body upon which the crown is formed is made of an elastomer which is pressurized into sealing engagement with the bottom of the borehole thereby further sealing freshly cut formation from drilling fluid.

    摘要翻译： 在其中多晶金刚石刀具的钻头和方法安装在比特冠切芯片的形成类似于在其中磨碎器切奶酪的方式。 在不可渗透的或塑料的地层芯片通过切割器挤出到空腔内部，以经由每个切刀相邻的槽的位。 钻井流体循环的内部从钻柱的钻头，并进入环空上面做了钻头轴承切割器的部分。 在一个中，钻头体在其冠部形成的实施例部分由弹性体，所有这些被加压到与钻孔从而密封从钻井液还新鲜切割形成的底部密封接合。

    Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities
    4.
    发明公开
    Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities 失效
    超硬切削结构具有改进的刚性和导热性螺旋钻孔

    公开(公告)号：EP0716215A3

    公开(公告)日：1998-03-18

    申请号：EP95118382.1

    申请日：1995-11-22

    申请人： BAKER HUGHES INCORPORATED

    发明人： Cooley, Craig H. ,  Tibbitts, Gordon A. ,  Hansen, Wayne R.

    IPC分类号： E21B10/56 ,  E21B10/60

    CPC分类号： E21B10/43 ,  E21B10/55 ,  E21B10/567 ,  E21B10/5735 ,  E21B10/60

    摘要： A cutting element for a rotary drill bit for subterranean drilling, including a substantially planar table of superhard material having a cutting face and a cutting edge. The table may be reinforced against bending with one or more strut portions extending from the rear of the table to the rear of the substrate and at least partially across the cutting element. The strut portions may be integral with the diamond table, or separately fabricated and of another material. The strut portions, in addition to or in lieu of providing stiffness to the superhard table, may also serve to enhance heat transfer away from the cutting face and cutting edge of the superhard table. The structure supporting the cutting element on the drill bit and the body of the drill bit itself may be additionally configured to include structures to facilitate heat transfer away from the superhard table.

    Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor
    7.
    发明公开
    Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor 失效
    Diamantenschneiden mitgeänderterSchneidkantengeometrie und ihre Montageanordnung am Bohrmeissel。

    公开(公告)号：EP0572761A1

    公开(公告)日：1993-12-08

    申请号：EP93101795.8

    申请日：1993-02-05

    申请人： BAKER-HUGHES INCORPORATED

    发明人： Cooley, Craig H. ,  Lund, Jeffrey B. ,  Smith, Redd H.

    IPC分类号： E21B10/46

    CPC分类号： E21B10/5673

    摘要： A diamond cutting element (10) including a substantially planar diamond table (12) having a periphery (16) defined by a multiple chamfer (20,22). The angle of the outermost chamfer (20) may be oriented to provide a bearing surface on the cutting element at the place of engagement with the formation being drilled.

    摘要翻译： 一种金刚石切割元件（10），其包括具有由多个倒角（20,22）限定的周边（16）的基本平坦的金刚石台（12）。 最外斜面（20）的角度可以被定向成在切割元件上提供与要钻孔的地层的接合位置处的支承表面。