Window mill and drill bit
    1.
    发明申请
    Window mill and drill bit 有权
    窗磨机和钻头

    公开(公告)号:US20050039905A1

    公开(公告)日:2005-02-24

    申请号:US10916342

    申请日:2004-08-10

    CPC分类号: E21B10/55 E21B29/06

    摘要: A method and apparatus for running a whipstock into a well bore attached to a combination mill and drill bit, releasing the mill/bit from the whipstock, milling a window in the casing, and drilling a lateral well bore, all in one trip. The mill/bit is provided with a primary cutting structure better suited for milling through the casing, and a secondary cutting structure, better suited for drilling through the earth formation. The secondary cutting structure is initially smaller in diameter than the primary cutting structure. The whipstock can be attached to the mill/bit with a shear bolt supported by a boss on the whipstock, with the boss designed to arrest axial motion of the mill/bit after shearing of the bolt.

    摘要翻译: 一种用于将造斜器运行到连接到组合磨机和钻头的井眼中的方法和装置,将来自造斜器的磨机/钻头释放,在壳体中铣削窗口,并且在一个行程中钻一个侧井。 铣床/钻头设置有更适合于通过壳体铣削的主切割结构,以及更适合于穿过地层钻孔的次切割结构。 次级切割结构的直径初始小于主切割结构。 造斜器可以用由造斜器上的凸台支撑的剪切螺栓连接到铣刀/钻头,凸台被设计成在剪切螺栓之后阻止铣刀/钻头的轴向运动。