发明名称 |
BLOWOUT PREVENTER BLADE ASSEMBLY AND METHOD OF USING SAME |
摘要 |
The techniques herein relate to a blade assembly of a blowout preventer for shearing a tubular of a wellbore penetrating a subterranean formation. The blowout preventer has a housing with a hole therethrough for receiving the tubular. The blade assembly includes a ram block movable between a non-engagement position and an engagement position about the tubular, a blade carried by the ram block for cuttingly engaging the tubular, a retractable guide carried by the ram block and slidably movable therealong, and a release mechanism for selectively releasing the guide to move between a guide position for guiding engagement with the tubular and a cutting position a distance behind the blade for permitting the blade to cuttingly engage the tubular. |
申请公布号 |
US2012073816(A1) |
申请公布日期 |
2012.03.29 |
申请号 |
US201113247517 |
申请日期 |
2011.09.28 |
申请人 |
SPRINGETT FRANK BENJAMIN;JOHNSON CHRISTOPHER DALE;PETERS SHERN EUGENE;ENSLEY ERIC TREVOR;NATIONAL OILWELL VARCO, L.P. |
发明人 |
SPRINGETT FRANK BENJAMIN;JOHNSON CHRISTOPHER DALE;PETERS SHERN EUGENE;ENSLEY ERIC TREVOR |
分类号 |
E21B33/06;E21B29/00;E21B29/12;E21B33/064 |
主分类号 |
E21B33/06 |
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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