发明名称 |
DYNAMIC ANNULAR SEALING APPARATUS |
摘要 |
The invention relates to a dynamic annular sealing apparatus comprising a resilient sleeve deformable between a closed sealing configuration and an open non-sealing configuration and a pump controllable to effect such deformation by alteration of pressure exerted on the sleeve. The apparatus is particularly suited to use in wellbore applications. |
申请公布号 |
WO2014006149(A3) |
申请公布日期 |
2014.11.20 |
申请号 |
WO2013EP64172 |
申请日期 |
2013.07.04 |
申请人 |
STATOIL PETROLEUM AS |
发明人 |
ROLLAND, NILS LENNART;TVERLID, STEINAR WASA |
分类号 |
E21B33/08;E21B33/06 |
主分类号 |
E21B33/08 |
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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