发明授权
- 专利标题： Method and apparatus to remove a downhole drill collar from a well bore
- 专利标题（中）： 从井眼移除井下钻铤的方法和装置
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申请号： US12799546申请日： 2010-04-27
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公开(公告)号： US07997332B2公开(公告)日： 2011-08-16
- 发明人: Michael C. Robertson
- 申请人： Michael C. Robertson
- 申请人地址： US TX Arlington
- 专利权人： Robertson Intellectual Properties, LLC
- 当前专利权人： Robertson Intellectual Properties, LLC
- 当前专利权人地址： US TX Arlington
- 代理机构： The Matthews Firm
- 主分类号： E21B29/00
- IPC分类号： E21B29/00
摘要：
A method of severing a drill string or other tubular string that includes lowering a torch into the drill string, positioning the torch at a joint in the drill string, such that the joint may have a pin component engaged with a box component, igniting the torch to produce cutting fluids, and directing the cutting fluids into the joint in a direction that is along a length of the drill string to cut the joint.
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