BLOWOUT PREVENTER BLADE ASSEMBLY WITH RETRACTABLE GUIDE
摘要
<p>Techniques for shearing a tubular of a wellbore penetrating a subterranean formation with a blowout preventer are provided. The blowout preventer has a housing with a hole therethrough for receiving the tubular. The techniques relate to a blade assembly including 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, and a retractable guide carried by the ram block and slidably movable therealong. The retractable guide has a guide surface for urging the tubular into a desired location in the blowout preventer as the ram block moves to the engagement position.</p>
申请公布号
CA2812646(C)
申请公布日期
2015.11.03
申请号
CA20112812646
申请日期
2011.09.29
申请人
NATIONAL OILWELL VARCO, L.P.
发明人
SPRINGETT, FRANK BENJAMIN;JOHNSON, CHRISTOPHER DALE;PETERS, SHERN EUGENE;ENSLEY, ERIC TREVOR