发明名称 |
Pumpdown valve plug assembly for liner cementing system |
摘要 |
Method and apparatus are disclosed for use in cementing a tubular member which is run into a borehole using a drill string. A landing collar is attached to the tubular member near the bottom of the tubular member, and the landing collar has an opening at least five inches in diameter. A liner wiper assembly is releasably suspended from the drill string. The liner wiper assembly comprises a lower liner wiper plug comprising float valves and an upper liner wiper plug. With the method and apparatus of the present invention, plugging problems are minimized.
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申请公布号 |
US2002000318(A1) |
申请公布日期 |
2002.01.03 |
申请号 |
US20010932897 |
申请日期 |
2001.08.20 |
申请人 |
ALLAMON JERRY P.;MILLER JACK E. |
发明人 |
ALLAMON JERRY P.;MILLER JACK E. |
分类号 |
A61F2/958;A61M29/02;E21B33/16;(IPC1-7):E21B23/08 |
主分类号 |
A61F2/958 |
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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