发明名称 |
Apparatus and method for obtaining a core at in situ pressure |
摘要 |
A method and apparatus are disclosed for obtaining a core at in situ pressure of sedimentary deposits at the bottom of a well bore or body of water. The core barrel has a pressure chamber that is closed and opened by a ball valve actuated from the surface. When in position above the sedimentary deposits to be cored, a sample tube is extended from the pressure chamber into the sedimentary deposits to obtain a core. The sample tube is retracted into the pressure chamber and the valve closed to trap ambient pressure in the chamber. The sample tube and valve are operated from the surface.
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申请公布号 |
US4317490(A) |
申请公布日期 |
1982.03.02 |
申请号 |
US19800128104 |
申请日期 |
1980.03.07 |
申请人 |
TEXAS A & M UNIVERSITY SYSTEM |
发明人 |
MILBERGER, LIONEL J.;DENK, EDDIE W.;HOSTRUP, KAI R. |
分类号 |
E21B25/04;E21B25/08;E21B25/18;(IPC1-7):E21B25/04;E21B49/00 |
主分类号 |
E21B25/04 |
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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