Rotationally indexable cutting elements and drill bits therefor
    2.
    发明申请
    Rotationally indexable cutting elements and drill bits therefor 有权
    可旋转可转位的切割元件和钻头

    公开(公告)号:US20090020339A1

    公开(公告)日:2009-01-22

    申请号:US11879974

    申请日:2007-07-18

    IPC分类号: E21B10/46

    CPC分类号: E21B10/43 E21B10/633

    摘要: A cutting element for use with a drill bit includes a substrate having a longitudinal axis, a lateral surface substantially symmetric about the longitudinal axis and one or more key elements coupled to the lateral surface. The lateral surface lies between an insertion end and a cutting end of the substrate. The one or more key elements are substantially axially aligned with the longitudinal axis and configured to selectively rotationally locate the substrate in a pocket. A drill bit configured for retaining a cutting element having one or more key elements is also disclosed.

    摘要翻译: 用于钻头的切割元件包括具有纵向轴线的基底,围绕纵向轴线大致对称的侧表面以及联接到侧面的一个或多个关键元件。 侧表面位于基片的插入端和切割端之间。 一个或多个关键元件基本上与纵向轴线对准并且被配置为选择性地将基板旋转定位在口袋中。 还公开了一种用于保持具有一个或多个关键元件的切割元件的钻头。

    PDC CUTTER WITH OVAL CROSS-SECTION
    3.
    发明申请
    PDC CUTTER WITH OVAL CROSS-SECTION 审中-公开
    带有椭圆曲线的PDC切割机

    公开(公告)号:US20090008155A1

    公开(公告)日:2009-01-08

    申请号:US12138891

    申请日:2008-06-13

    IPC分类号: E21B10/43

    摘要: A drag bit having cutting elements, wherein the cross section of the cutting elements is an oval shape, wherein in one embodiment the major axis is perpendicular to the surface of the drag bit blade. A method is also included, wherein the method comprises using a milling bit having an oval cross section that thereby produces pockets in the drag bit blades for receiving the oval shaped cutting elements. Use of the oval bit also results in a half oval formed at the closed end of the pocket.

    摘要翻译: 具有切割元件的拖曳钻头,其中所述切割元件的横截面为椭圆形,其中在一个实施例中,所述长轴垂直于所述犁刀刃的表面。 还包括一种方法,其中该方法包括使用具有椭圆形横截面的研磨钻头,从而在拖曳钻头刀片中产生用于接收椭圆形切割元件的凹坑。 使用椭圆形的钻头也会形成在口袋封闭端形成的半椭圆形。