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    • 137. 发明申请
    • Method of drilling an enlarged sidetracked well bore
    • 钻扩大侧钻孔的方法
    • US20070007000A1
    • 2007-01-11
    • US11175565
    • 2005-07-06
    • Charles DeweyPraful DesaiJohn Campbell
    • Charles DeweyPraful DesaiJohn Campbell
    • E21B29/10
    • E21B10/62E21B7/061
    • A method of milling a window through a casing in a primary well bore and drilling an enlarged sidetracked well bore comprises running into the primary well bore a drilling assembly comprising at least one cutting apparatus adapted to drill an enlarged borehole, milling a window through the casing, and drilling the enlarged sidetracked well bore, wherein the milling and drilling steps are performed in one trip into the primary well bore. A drilling assembly comprises at least one cutting apparatus operable to drill an enlarged borehole, wherein the drilling assembly is operable to mill a window through a casing in a primary well bore and drill an enlarged sidetracked well bore through the window in one trip into the primary well bore.
    • 通过在主井眼中的壳体铣削窗口并钻出扩大的侧向钻井孔的方法包括进入主井孔中的钻井组件,该钻井组件包括适于钻扩大钻孔的至少一个切割装置,通过壳体铣削窗口 ,并钻出扩大的侧钻孔,其中铣削和钻削步骤在一次进入主井眼中进行。 钻井组件包括至少一个可操作以钻取扩大钻孔的切割装置,其中所述钻井组件可操作以通过主井眼中的壳体研磨窗口,并且将一个扩大的侧向钻井孔穿过所述窗口,一次进入所述主井眼 井眼。