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    • 6. 发明授权
    • Drill bit assembly for releasably retaining a drill bit cutter
    • 钻头组件可释放地保持钻头刀具
    • US06427791B1
    • 2002-08-06
    • US09764082
    • 2001-01-19
    • David A. GlowkaDavid W. Raymond
    • David A. GlowkaDavid W. Raymond
    • E21D1710
    • E21B10/633E21C35/1936E21C2035/1826
    • A drill bit assembly is provided for releasably retaining a polycrystalline diamond compact drill bit cutter. Two adjacent cavities formed in a drill bit body house, respectively, the disc-shaped drill bit cutter and a wedge-shaped cutter lock element with a removable fastener. The cutter lock element engages one flat surface of the cutter to retain the cutter in its cavity. The drill bit assembly thus enables the cutter to be locked against axial and/or rotational movement while still providing for easy removal of a worn or damaged cutter. The ability to adjust and replace cutters in the field reduces the effect of wear, helps maintains performance and improves drilling efficiency.
    • 提供钻头组件用于可释放地保持多晶金刚石致密钻头刀具。 分别形成在钻头体室中的两个相邻的空腔,所述盘形钻头刀具和具有可拆卸紧固件的楔形刀具锁定元件。 切割器锁定元件接合切割器的一个平坦表面以将切割器保持在其空腔中。 因此,钻头组件使得切割器能够被锁定以防止轴向和/或旋转运动,同时仍然提供容易地去除磨损或损坏的切割器。 在现场调整和更换切割机的能力降低了磨损的影响,有助于维持性能并提高钻井效率。