发明名称 |
Rod insertion method and friction reducing device |
摘要 |
The present invention provides a friction reducing device for an elongate member. The device comprises a friction reducing sleeve removably positionable on a first longitudinal segment of the elongate member. The present invention also provides a method of inserting an elongate assembly into the ground. The method comprises the step of incorporating the inventive friction reducing device in the elongate assembly.
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申请公布号 |
US5265466(A) |
申请公布日期 |
1993.11.30 |
申请号 |
US19920845418 |
申请日期 |
1992.03.03 |
申请人 |
CONOCO INC. |
发明人 |
RICHTER, DAVID L.;SWEENEY, WILLIAM T. |
分类号 |
E21B7/26;E21B17/10;E21B47/01;E21B49/00;G01N1/08;(IPC1-7):G01N3/00 |
主分类号 |
E21B7/26 |
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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