Blowout preventer blade assembly and method of using same

摘要

A blade assembly of a blowout preventer for shearing a tubular of a wellbore penetrating a subterranean formation is provided. 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.

主权项

1. A blade assembly of a blowout preventer for shearing a tubular of a wellbore penetrating a subterranean formation, the blowout preventer having a housing with a hole therethrough for receiving the tubular, the blade assembly comprising:
a ram block movable between a non-engagement position and an engagement position about the tubular; a blade carried by the ram block to cuttingly engage the tubular; a retractable guide carried by the ram block and slidably movable therealong, the retractable guide having a guide surface guidingly engageable with the tubular; and a release mechanism to selectively release the retractable guide to move along the ram block, the release mechanism comprising a latch operatively connectable to the retractable guide.