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1. 发明公开

EP0690201A2 Forming casing window off whipstock set in cement plug 失效
标题翻译：在壳体内形成一个窗口，从，坐在水泥塞，造斜器
公开(公告)号：EP0690201A2
公开(公告)日：1996-01-03
申请号：EP95401517.8
申请日：1995-06-26
申请人： SOFITECH N.V. , COMPAGNIE DES SERVICES DOWELL SCHLUMBERGER S.A.
发明人： Doremus, Denis , Leising, Lawrence , Shaheen, Mansour
IPC分类号： E21B29/06
CPC分类号： E21B29/06 , E21B7/061 , E21B7/068 , E21B23/00
摘要： Methods and systems for forming a window through the wall of a well casing to enable a new borehole to be drilled outside the casing include forming a cement plug in the casing, drilling a laterally offset hole in the cement plug, orienting and setting a whipstock in the offset hole, and using the whipstock to drill an elongated window through the casing wall opposite its deflector surface. The drilling steps employ a mud motor having a bent housing that establishes a toolface for the bit, and proper orientation is obtained by downhole measurement and transmission to the surface of orientation signals and downhole adjustment of orientation to a selected toolface value. The whipstock is oriented in the same manner. All drilling and orientation procedures are carried out on coiled tubing to reduce costs.
摘要翻译：通过prodn的下端下方的井套管的壁形成一个窗口的方法。管悬浮于其中，该窗口允许新井眼的壳体外部，包括：（a）形成细长的水泥塞在prodn的下端下方的套管钻孔。管; （B）在钻井的水泥塞哪个曲线到壳体的侧壁上，然后沿着侧壁纵向延伸的孔; （C）设定具有与面对于所述壳体的内壁面的偏转表面上的孔的偏转表面上的造斜器; 和（d）通过使用该偏转器表面作为引导凸轮在壳体的壁长窗口的铣削; 其中（e）中钻孔步骤（b）是使用具有旋转轴处的角度在壳体的纵向轴线的旋转铣刀。因此，一种被appts的组合。（组分）用于通过井套管的壁形成在所选择的方位角方向的窗口使用。

2. 发明授权

EP0690201B1 Forming casing window off whipstock set in cement plug 失效
标题翻译：在壳体内形成一个窗口，从，坐在水泥塞，造斜器
公开(公告)号：EP0690201B1
公开(公告)日：2000-03-22
申请号：EP95401517.8
申请日：1995-06-26
申请人： SOFITECH N.V. , COMPAGNIE DES SERVICES DOWELL SCHLUMBERGER S.A.
发明人： Doremus, Denis , Leising, Lawrence , Shaheen, Mansour
IPC分类号： E21B29/06
CPC分类号： E21B29/06 , E21B7/061 , E21B7/068 , E21B23/00

3. 发明公开

EP0690201A3 Forming casing window off whipstock set in cement plug 失效
标题翻译：在壳体内形成一个窗口，从，坐在水泥塞，造斜器
公开(公告)号：EP0690201A3
公开(公告)日：1996-12-27
申请号：EP95401517.8
申请日：1995-06-26
申请人： SOFITECH N.V. , COMPAGNIE DES SERVICES DOWELL SCHLUMBERGER S.A.
发明人： Doremus, Denis , Leising, Lawrence , Shaheen, Mansour
IPC分类号： E21B29/06
CPC分类号： E21B29/06 , E21B7/061 , E21B7/068 , E21B23/00
摘要： Methods and systems for forming a window through the wall of a well casing to enable a new borehole to be drilled outside the casing include forming a cement plug in the casing, drilling a laterally offset hole in the cement plug, orienting and setting a whipstock in the offset hole, and using the whipstock to drill an elongated window through the casing wall opposite its deflector surface. The drilling steps employ a mud motor having a bent housing that establishes a toolface for the bit, and proper orientation is obtained by downhole measurement and transmission to the surface of orientation signals and downhole adjustment of orientation to a selected toolface value. The whipstock is oriented in the same manner. All drilling and orientation procedures are carried out on coiled tubing to reduce costs.

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