Inclined leg earth-boring bit
    3.
    发明授权
    Inclined leg earth-boring bit 失效
    倾斜的腿地球钻头

    公开(公告)号:US06227314B1

    公开(公告)日:2001-05-08

    申请号:US09301750

    申请日:1999-04-29

    IPC分类号: E21B1016

    CPC分类号: E21B10/08 E21B10/18

    摘要: An earth-boring bit has a body with a threaded pin on the upper end for connecting to a drill string. Bit legs are formed symmetrically on the exterior of the body and extend downward. The lower portion of each bit leg is inclined and offset circumferentially from the upper portion. A cutter is mounted to the lower portion of each bit leg for rotation about a cutter axis. Nozzle bosses are located between each bit leg. A flow channel exists on both sides of each nozzle boss. The nozzle boss is inclined in a similar direction to the bit leg.

    摘要翻译: 钻孔钻头具有在上端具有螺纹销的主体,用于连接钻柱。 位腿对称地形成在主体的外部并向下延伸。 每个位腿的下部从上部倾斜并偏移。 切割器安装到每个钻头的下部以围绕切割器轴线旋转。 喷嘴老板位于每个位腿之间。 每个喷嘴凸台的两侧都有流动通道。 喷嘴凸台的倾斜方向与钻头腿相同。