Cutting element structure for roller cone bit
    2.
    发明授权
    Cutting element structure for roller cone bit 有权
    滚子锥头切割元件结构

    公开(公告)号:US07152701B2

    公开(公告)日:2006-12-26

    申请号:US10920718

    申请日:2004-08-17

    IPC分类号: E21B10/08

    摘要: A roller cone drill bit includes a bit body adapted to be coupled to a drill string, a bearing journal depending from the bit body, and a single roller cone rotatably attached to the bearing journal. The single roller cone has a plurality of cutting elements, where at least one of the plurality of cutting elements is formed of an inner region that is at least partially surrounded by an outer region, where the inner region is more abrasive resistant than the outer region. Such an arrangement in a single roller cone bit allows the at least one cutting element to be “self-sharpening.”

    摘要翻译: 滚子锥形钻头包括适于联接到钻柱的钻头体,从钻头体悬垂的轴承轴颈和可旋转地附接到轴承轴颈的单个滚子圆锥体。 单个辊筒具有多个切割元件,其中多个切割元件中的至少一个切割元件由至少部分地被外部区域包围的内部区域形成,其中内部区域比外部区域更具有耐磨性 。 在单个辊锥头中的这种布置允许至少一个切割元件“自锐化”。