发明名称 |
METHOD AND SYSTEM FOR INHIBITING CEMENT DEPOSITION IN A JACK AND PULL (JAP) EXPANSION ASSEMBLY |
摘要 |
A hydraulically actuated Jack And Pull (JAP) tubular expansion tool string comprises: - an annular non-return valve arranged in the wall of the JAP string (7), which allows mud to flow from a surrounding annulus into the bore of the expansion tool string when the pressure in the bore of the tool string is lower than that in the annulus; - a second non-return valve (8) arranged in the JAP string below the annular valve(7) which allows fluid to move down only; - wherein during the cycling of the jack the annular non-return valve (7) is continuously open and the second non-return valve(8) cycles with the jack movement to inhibit curing of cement in the expansion tool string. |
申请公布号 |
WO2017001477(A1) |
申请公布日期 |
2017.01.05 |
申请号 |
WO2016EP65143 |
申请日期 |
2016.06.29 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.;SHELL OIL COMPANY |
发明人 |
WUBBEN, Antonius, Leonardus, Maria |
分类号 |
E21B33/16;E21B34/10;E21B43/10 |
主分类号 |
E21B33/16 |
代理机构 |
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代理人 |
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地址 |
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