Side cutting gage pad improving stabilization and borehole integrity
    1.
    发明授权
    Side cutting gage pad improving stabilization and borehole integrity 失效
    侧切割垫提高稳定性和钻孔完整性

    公开(公告)号:US06684967B2

    公开(公告)日:2004-02-03

    申请号:US09897580

    申请日:2001-07-02

    IPC分类号: E21B1204

    摘要: A drill bit including improved gage pads is particularly adapted for side cutting a borehole wall. In a preferred embodiment, the drill bit gage pads alternate between an active gage pad with a cutting surface portion and a non-active gage pad with a wear-resistant surface. Gage pad cutting elements placed on a first active gage pad cooperate with gage pad cutting elements placed on other active gage pads. What results is a contiguous series of overlapping cutting elements suitable to cut the borehole wall. Non-active gage pads are preferably placed between the active cutting gage pads. These non-active gage pads have a wear-resistant surface (such as steel or diamond insert) that extends to the gage diameter. These non-active gage pads help to maintain borehole size and prevent undue torque being placed on the drill bit.

    摘要翻译: 包括改进的测量垫的钻头特别适用于侧切割钻孔壁。 在优选实施例中,钻头计量垫在具有切削表面部分的活动量具垫和具有耐磨表面的非活动量具垫之间交替。 放置在第一活动量具垫上的量具垫切割元件与放置在其他活动量具垫上的量具垫切割元件配合。 连续的一系列重叠切割元件适合于切割钻孔壁的结果是什么。 非活性量具垫优选地放置在活动的切割量具垫之间。 这些非活性量具垫具有延伸到量具直径的耐磨表面(例如钢或金刚石插入件)。 这些非活动量规垫有助于保持钻孔尺寸,并防止钻头上施加不适当的扭矩。

    Side cutting gage pad improving stabilization and borehole integrity
    3.
    发明授权
    Side cutting gage pad improving stabilization and borehole integrity 有权
    侧切割垫提高稳定性和钻孔完整性

    公开(公告)号:US06253863B1

    公开(公告)日:2001-07-03

    申请号:US09368833

    申请日:1999-08-05

    IPC分类号: E21B1204

    摘要: A drill bit including improved gage pads is particularly adapted for side cutting a borehole wall. In a preferred embodiment, each gage pad preferably includes a cutting surface portion and a wear-resistant surface. Gage pad cutting elements placed on a first gage pad cutting surface portion cooperate with gage pad cutting elements on other gage pads to reduce the torque on each gage pad cutting surface. The cutting elements may be made more aggressive by the reduction of a wear-resistant surface trailing the cutting elements. The wear-resistant surface on the first gage pad is varied with the wear-resistant surface on other gage pads to yield the wear-resistant advantages of previous gage pads.

    摘要翻译: 包括改进的测量垫的钻头特别适用于侧切割钻孔壁。 在优选实施例中,每个量具垫优选地包括切割表面部分和耐磨表面。 放置在第一量规焊盘切割表面部分上的量具焊盘切割元件与其他量具焊盘上的焊盘切割元件配合,以减少每个量具焊盘切割表面上的扭矩。 通过减少切割元件后面的耐磨表面,可以使切割元件更具侵略性。 第一量规垫上的耐磨表面随着其他规格垫上的耐磨表面而变化,以产生先前的规格垫的耐磨性优点。