发明名称 |
WELLBORE CIRCULATION ASSEMBLY |
摘要 |
In some embodiments, a circulation assembly can direct all or substantially all fluid downstream in a drill string in a first mode of operation, and some or all fluid to an annulus in a second mode. Operation of the circulation assembly can be repeatedly changed between the modes of operation. In some embodiments, the circulation assembly can comprise other modes wherein fluid is apportioned between the annulus and the downstream drill string.
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申请公布号 |
US2011042100(A1) |
申请公布日期 |
2011.02.24 |
申请号 |
US20100766780 |
申请日期 |
2010.04.23 |
申请人 |
O'NEAL ERIC;KRUEGER V RUDOLPH ERNST;MOCK PHILIP |
发明人 |
O'NEAL ERIC;KRUEGER, V RUDOLPH ERNST;MOCK PHILIP |
分类号 |
E21B34/06;E21B34/00 |
主分类号 |
E21B34/06 |
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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