发明名称 |
PIPE IN PIPE PISTON THRUST SYSTEM |
摘要 |
A pipe in pipe piston thrust system comprises a plurality of piston assemblies configured to sealingly engage a wellbore, a pump configured to transfer a fluid into the wellbore, and a by-pass disposed between a plurality of annuli formed by the plurality of piston assemblies. The by-pass allows for selective communication of the fluid between the plurality of annuli. |
申请公布号 |
EP2872726(A1) |
申请公布日期 |
2015.05.20 |
申请号 |
EP20120881023 |
申请日期 |
2012.07.13 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
HAY, RICHARD THOMAS |
分类号 |
E21B23/08;E21B4/18;E21B33/124 |
主分类号 |
E21B23/08 |
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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