发明名称 |
MWD tool for deep, small diameter boreholes |
摘要 |
An MWD tool includes a mud pulse generator for operation in an upper section of borehole, a sensor portion for operating close to the drill bit in a deep small diameter section of the borehole and a connector portion running inside the drill pipe for conducting output signals of the sensor portion to the mud pulse generator for subsequent transmission to a receiver at the surface of the borehole.
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申请公布号 |
US5096001(A) |
申请公布日期 |
1992.03.17 |
申请号 |
US19910671253 |
申请日期 |
1991.03.18 |
申请人 |
TELECO OILFIELD SERVICES INC. |
发明人 |
BUYTAERT, JEAN P. R.;DUCKWORTH, ALLEN |
分类号 |
E21B47/12;E21B47/18 |
主分类号 |
E21B47/12 |
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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