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41. 发明授权

US5484017A Whipstock assembly for a sleeved casing 失效
标题翻译：针织套筒组合
公开(公告)号：US5484017A
公开(公告)日：1996-01-16
申请号：US371868
申请日：1995-01-12
申请人： Robert J. Coon
发明人： Robert J. Coon
IPC分类号： E21B7/06 , E21B7/08 , E21B17/00 , E21B34/14 , E21B43/14 , E21B23/00
CPC分类号： E21B7/061 , E21B17/00 , E21B34/14 , E21B43/14
摘要： A casing is provided with a sealable shifting sleeve. A whipstock is insertable into the casing and may be supported off of the casing in a predetermined location so that it is oriented toward an open window in the casing when the shifting sleeve is selectively moved upwardly. By presenting an open window for the whipstock oriented toward the window, a drillbit may be lowered through the casing to interact with the whipstock to immediately begin the drilling of the deviated wellbore. The drillbit cuts through any cement, if present, and into the formation. A bore is presented in the whipstock to allow production from pay zones below the whipstock while it is in place. Should it become necessary, the sliding sleeve may be subsequently closed to isolate the deviated wellbore which has been drilled with the whipstock through the open window.
摘要翻译：壳体设置有可密封的换档套筒。造斜器可插入壳体中，并且可以在预定位置处从壳体支撑，使得当换档套筒选择性地向上移动时，它被定向到壳体中的敞开的窗口。通过提供朝向窗户的造斜器的开放窗口，钻孔可以通过套管降低以与造斜器相互作用，以立即开始钻井偏离的井眼。钻头穿过任何水泥（如果存在），并进入地层。在造斜器上提供了一个孔，以允许在造斜器下方的工作区生产。如果有必要，可以随后关闭滑动套筒以将已经用造斜器钻出的偏斜的井筒隔离通过打开的窗口。

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