发明名称 |
METHOD AND APPARATUS FOR SEVERING A DRILL STRING |
摘要 |
A method of severing a drill-string comprises reducing the load bearing cross-sectional area of the neck of a connection. The reduction in the area of the neck may be achieved using a precisely located flow-actuated cutter. The cutter may be pumped into the string to land on a seat above the connection. A bypass valve may be provided below the connection to facilitate fluid circulation. |
申请公布号 |
US2017030156(A1) |
申请公布日期 |
2017.02.02 |
申请号 |
US201515304374 |
申请日期 |
2015.04.17 |
申请人 |
CHURCHILL DRILLING TOOLS LIMITED |
发明人 |
Churchill Andrew Philip |
分类号 |
E21B29/00;E21B23/08;E21B41/00;E21B37/00;E21B33/138 |
主分类号 |
E21B29/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Aberdeen GB |