发明名称 |
Junk basket and method of removing foreign material from a well |
摘要 |
An improved junk basket comprises a tool body having a longitudinally extending passageway therethrough and a magnet assembly disposed in the passageway. A retainer is cooperative between the magnet assembly and the tool body to retain the magnet assembly in a lower position in the passageway and selectively releasable to permit longitudinal movement of the magnet assembly to an upper position in the passageway whereby core cutting apparatus and/or an improved reverse circulation system, also included in the tool, may be employed.
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申请公布号 |
US4059155(A) |
申请公布日期 |
1977.11.22 |
申请号 |
US19760706387 |
申请日期 |
1976.07.19 |
申请人 |
INTERNATIONAL ENTERPRISES, INC. |
发明人 |
GREER, TOM R. |
分类号 |
E21B21/10;E21B25/14;E21B27/00;E21B31/06;E21B31/08;(IPC1-7):E21B31/06 |
主分类号 |
E21B21/10 |
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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