发明名称 |
DEVICE HAVING A HARD SEAT SUPPORT |
摘要 |
A device having a hard seat support disposed with a hard seat to reduce or prevent buckling, bursting, and/or permanent deformation of the hard seat that compromises the seal across the hard sealing surface and flapper sealing surface interface. The hard seat support may be positioned along an inner periphery of the hard seat or in direct contact with an outer periphery of the hard seat. |
申请公布号 |
EP2864582(A1) |
申请公布日期 |
2015.04.29 |
申请号 |
EP20130809375 |
申请日期 |
2013.06.14 |
申请人 |
SERVICES PÉTROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V. |
发明人 |
BIDDICK, DAVID JAMES;BYRNES, DAVID |
分类号 |
E21B34/06;F16K1/20 |
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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