公开(公告)号：US3487753A

公开(公告)日：1970-01-06

申请号：US3487753D

申请日：1968-04-10

Applicant: DRESSER IND

Inventor： READ NORMAN W ,  BLACKWELL HENRY W

IPC: E21B37/10 ,  F01B1/10 ,  F16J9/08 ,  F16J15/32

CPC classification number: E21B37/10

公开(公告)号：US3904212A

公开(公告)日：1975-09-09

申请号：US36701873

申请日：1973-06-04

Applicant: DRESSER IND

Inventor： PUGH TOBY S ,  BLACKWELL HENRY W

IPC: E21B33/06 ,  E21B33/00

CPC classification number: E21B33/062

Abstract: A well blowout preventer is disclosed having means for either hydraulically or manually activating the rams into position around a well pipe. In the hydraulic embodiment, a mechanical locking apparatus is provided to maintain the rams in position around the well pipe. The mechanical apparatus includes a threaded feed screw having an elongated slot therein which is keyed against rotation with respect to the blowout preventer housing and which thus advances through the housing by the action of a rotated threaded bushing in threaded contact with the feed screw.

Abstract translation: 公开了一种井筒防喷器，其具有用于液压地或手动地将柱塞激活到井管周围的位置的装置。 在液压实施例中，提供了一种机械锁定装置，用于将柱塞保持在井管周围的位置。 机械装置包括螺纹进料螺杆，其中具有细长的狭槽，其相对于防喷器壳体被锁定以防止旋转，并且因此通过与进给螺杆螺纹接触的旋转的螺纹衬套的作用而前进通过壳体。