发明名称 |
Rotary straddle tester apparatus with safety joint back-off clutch |
摘要 |
In accordance with an illustrative embodiment of the present invention, a one-way clutch mechanism is incorporated between the mandrel and housing of a rotary-operated pump apparatus that is used to inflate the packers of a drill stem testing system. The mandrel can be freely rotated to the right to operate the pump, however left-hand rotation causes the clutch mechanism to engage and the housing to be rotated with the mandrel to the left to disconnect a safety joint located in the tool string between the pump apparatus and the packers.
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申请公布号 |
US4408485(A) |
申请公布日期 |
1983.10.11 |
申请号 |
US19810276042 |
申请日期 |
1981.06.22 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
MCGILL, HOWARD L. |
分类号 |
E21B17/02;E21B17/06;E21B33/124;(IPC1-7):E21B47/00 |
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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