초록 ▼

Ram bodies mounted in transverse bores of a blowout preventer body with a longitudinal bore therethrough are operable by operating means extending through closures on one end of the transverse bores to move the rams to close off fluid communication through the longitudinal bore in the body and to re

Ram bodies mounted in transverse bores of a blowout preventer body with a longitudinal bore therethrough are operable by operating means extending through closures on one end of the transverse bores to move the rams to close off fluid communication through the longitudinal bore in the body and to retract the rams from the longitudinal bore. Removable seal means are provided on each ram body to seal with the transverse bore in which each ram body is mounted. Removable seal means extend diametrically across the front of each ram for sealingly engaging an elongate member in the longitudinal bore when the rams are closed. The removable seal means is retained in position by non-torquing means during use but may be readily replaced when necessary. Self energizing seal means on the ram body sealingly engage the transverse bores. Valve means is incorporated in the blowout preventer body to equalize pressure in the longitudinal bore above and below the closed rams when desired, which valve means is constructed and arranged to respond to pressure below the rams to remain closed until it is desired to open the valve means.

대표청구항 ▼

In a needle valve having a body with fluid passage means therein, the invention comprising: a. a valve stem rotatably and sealably carried by the body and having a tapered, annular closure surface thereon; b. longitudinally movable seat means in the body passage means for receiving said closure surf

In a needle valve having a body with fluid passage means therein, the invention comprising: a. a valve stem rotatably and sealably carried by the body and having a tapered, annular closure surface thereon; b. longitudinally movable seat means in the body passage means for receiving said closure surface to close off the passage means, said seat means rotatable by said valve stem when said closure surface engages said seat means during opening and closing of the valve to reduce wear and galling between the seat means and the closure surface; c. seal means sealing between said seat means and passage means; and d. said seal means responsive to fluid pressure in the body passage means to urge said seat means longitudinally in the passage means toward said closure surface to form a tighter seal in response to pressure in the passage means in the body.