| 发明名称 |
COMPARTMENTALIZED MWD TOOL WITH ISOLATED PRESSURE COMPENSATOR |
| 摘要 |
The present invention relates to a measurement-while-drilling (MWD) tool having a pressure compensation system and reservoir segregated from fluid integration with actuator mechanism lubricants. The MWD tool can also be serviced on the rig floor without the need to drain, reseal and charge the compensation system.
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| 申请公布号 |
US2009301780(A1) |
申请公布日期 |
2009.12.10 |
| 申请号 |
US20080134709 |
申请日期 |
2008.06.06 |
| 申请人 |
THE GEARHART COMPANIES, INC. |
发明人 |
GEARHART MARVIN;MILLIGAN DANIEL E.;SMITH HOWARD;NAYLOR DENNIS L.;REDMOND MICHAEL |
| 分类号 |
E21B21/08 |
主分类号 |
E21B21/08 |
| 代理机构 |
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