发明名称 |
Coupling apparatus for a tubing and wireline conveyed method and apparatus |
摘要 |
A new method of standalone perforating comprises the steps of lowering a perforator part-way into a borehole on a tubing string; when perforating is desired, connecting a wireline to the perforator; disconnecting the perforator from the tubing string; lowering the perforator into the borehole to the desired depth; attaching the perforator to the borehole casing or formation by setting an anchor on the perforator; disconnecting all wireline and associated apparatus from the perforator; withdrawing the wireline apparatus to the well surface; with the perforator standing alone in the well, firing the perforator into the surrounding formation; and dropping the perforator to the bottom of the well. A new apparatus for releasing the perforator from the tubing string includes a neutral release latch mechanism, and a new anchoring apparatus includes two interleaved coil springs having beveled shaped surfaces. Compression of an inner coil spring forces a radial expansion of an outer slip coil spring until the slip coil spring contacts the borehole wall and sets the anchor.
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申请公布号 |
US5050682(A) |
申请公布日期 |
1991.09.24 |
申请号 |
US19900616452 |
申请日期 |
1990.11.20 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
HUBER, KLAUS B.;HROMAS, JOE C.;EDWARDS, ARNOLD G. |
分类号 |
E21B17/02;E21B23/01;E21B23/02;E21B23/14;E21B43/116 |
主分类号 |
E21B17/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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