发明名称 |
Device for generating sound pulses inside a well, by percussion |
摘要 |
A device for generating sound pulses in a well by a mobile mass striking against a target element integral with an elongate body anchored in a well by retractable shoes actuated by hydraulic cylinders. The mobile mass which slides in a first chamber in the body is moved away by a piston moving in a second chamber of the body and intermittently locked in the moved away position by a valve. The piston, the valve and also the hydraulic cylinders acting on the anchorage shoes are actuated by a hydraulic system which may be remote controlled from the surface.
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申请公布号 |
US4648478(A) |
申请公布日期 |
1987.03.10 |
申请号 |
US19850694053 |
申请日期 |
1985.01.23 |
申请人 |
INSTITUT FRANCAIS DU PETROL |
发明人 |
DEDOLE, PASCAL;GROLET, PIERRE;LAURENT, JEAN |
分类号 |
G01V1/053;G01V1/147;G01V1/52;(IPC1-7):G01V1/00;G01V1/04;G01V1/40 |
主分类号 |
G01V1/053 |
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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