发明名称 |
ANTI-EXTRUSION BACKUP SYSTEM, PACKING ELEMENT SYSTEM HAVING BACKUP SYSTEM, AND METHOD |
摘要 |
An antiextrusion backup system includes an inner expandable backup ring having a first set of slots. An outer expandable backup ring having a second set of slots wherein the outer expandable back up ring is rotationally locked to the inner expandable backup ring to prevent an extrusion gap in an expanded condition of the backup rings. A method for operating within a tubular is also included.
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申请公布号 |
WO2012074686(A1) |
申请公布日期 |
2012.06.07 |
申请号 |
WO2011US59767 |
申请日期 |
2011.11.08 |
申请人 |
BAKER HUGHES INCORPORATED;FARQUHAR, GRAHAM E. |
发明人 |
FARQUHAR, GRAHAM E. |
分类号 |
E21B33/128;E21B33/12 |
主分类号 |
E21B33/128 |
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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