发明申请
- 专利标题: Method for Making Wellbore that Maintains a Minimum Drift
- 专利标题(中): 使井筒保持最小漂移的方法
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申请号: US12511804申请日: 2009-07-29
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公开(公告)号: US20100032167A1公开(公告)日: 2010-02-11
- 发明人: Mark K. Adam , Dennis G. Jiral , Lance M. Rayne , Michael E. McMahan
- 申请人: Mark K. Adam , Dennis G. Jiral , Lance M. Rayne , Michael E. McMahan
- 主分类号: E21B23/00
- IPC分类号: E21B23/00
摘要:
A well having a minimum drift between or among strings is provided using strings that have a recessed segment and a hanging segment. The length of the recessed segment in the lower end of the upper string is substantially longer than the hanging segment of the lower string that is passed through it. The hanging segments define the drift dimension. In the event the lower string gets stuck in the open hole before it is fully advanced, the hanging segment of the lower string may still be in the recess of the upper string so that the drift dimension can be preserved. Preferably the recess segment is the substantial length of the tubular string apart from its hanging segment near its top end. One or more laterals can be extended through the recessed segments while retaining the drift dimension.
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