发明名称 |
Soft set overshot fishing tool |
摘要 |
A fluid operated overshot with an outer metal mandrel internally supports a resilient internal sleeve. The sleeve telescopes over a fish to grip the fish on expanding radially inwardly. This expansion is fluid powered by applying a force to the inner sleeve to expand inwardly from a piston which compresses the sleeve, or form surrounding the inner sleeve in a concentric fluid receiving cavity.
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申请公布号 |
US5249625(A) |
申请公布日期 |
1993.10.05 |
申请号 |
US19920836869 |
申请日期 |
1992.05.08 |
申请人 |
SKIPPER, UVON;WARD, JAMES W. |
发明人 |
SKIPPER, UVON;WARD, JAMES W. |
分类号 |
E21B23/04;E21B31/18;(IPC1-7):E21B31/18 |
主分类号 |
E21B23/04 |
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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