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    • 2. 发明授权
    • Drilling kick-off device
    • 钻机启动装置
    • US5431223A
    • 1995-07-11
    • US234220
    • 1994-04-28
    • Michael R. Konopczynski
    • Michael R. Konopczynski
    • E21B7/06E21B7/08
    • E21B7/061
    • A kick-off device is provided. The kick-off device is useful in drilling a pair of opposite deviated borehole branches in an under ground formation from a single borehole and comprises an open-ended tube provided at its upper end with connecting means to join the open-ended tube to a string of casing, and a guide element arranged in the open-ended tube near its lower end, which guide element includes two hollow slanted guide ways arranged on opposite sides of the guide element, wherein the wall of the open-ended tube has elongated openings facing the slanted guide ways.
    • 提供一个启动装置。 起动装置可用于在单个钻孔中在下地层钻探一对相对的偏斜钻孔分支,并且包括设置在其上端的开口管,其连接装置将开口管连接到弦 壳体的引导元件和布置在其下端的开口管中的引导元件,该引导元件包括布置在引导元件的相对侧上的两个中空的倾斜引导件,其中开口管的壁具有面向 倾斜的导轨方式。