发明名称 |
CASING BOTTOM HOLE ASSEMBLY RETRIEVAL PROCESS |
摘要 |
A process for retrieving a bottom hole assembly through a casing string may include: installing a casing string in a borehole, the casing string including a bottom hole assembly releasably engaged thereto and moveable through an inner diameter of the casing string; releasing the bottom hole assembly from engagement with the casing string; reducing hydrostatic pressure in the casing string inner diameter above the bottom hole assembly so that the casing string inner diameter pressure above the bottom hole assembly is lower than a fluid pressure below the bottom hole assembly; permitting reverse circulation down through an annulus between the casing string and the borehole to permit the bottom hole assembly to rise up through the casing string toward the surface; and retrieving the bottom hole assembly from the casing string. |
申请公布号 |
CA2618409(C) |
申请公布日期 |
2014.05.06 |
申请号 |
CA20062618409 |
申请日期 |
2006.08.02 |
申请人 |
TESCO CORPORATION |
发明人 |
ANGMAN, PER G.;TESSARI, ROBERT M.;WARREN, TOMMY M. |
分类号 |
E21B23/08;E21B19/02;E21B23/14 |
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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