Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1983-12-15
1985-05-28
Scott, Samuel
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
251 58, 166321, 166323, F16K 31143
Patent
active
045195765
ABSTRACT:
A drill string safety valve operator provides a rotatable tubular body having a longitudinal through bore for conveying fluids. A valve member is movably disposed within the body for valving the fluid flow through the bore. A crank arm extends from and is coupled to the valve member at the valve stem for moving the valve member between open flow and closed flow positions responsive to rotation of the crank arm. A bearing is carried at the outboard end of the crank arm for transmitting load to the crank arm. An annular ring is supported about the tubular housing and provides a surface that can engage the bearing. Hydraulic cylinders power the annular ring so that the annular ring engages the bearing. Downward movement of the ring causes a corresponding downward movement of the bearing and a corresponding rotation of the crank arm. The apparatus thus allows quick remote closure of the valve during a blowout condition of the drill pipe bore.
REFERENCES:
patent: 3092131 (1963-06-01), Brown et al.
patent: 3509913 (1970-05-01), Lewis
patent: 3747618 (1973-07-01), Boes
patent: 3941348 (1976-03-01), Mott
patent: 3995827 (1976-12-01), Piquet
patent: 4073465 (1978-02-01), Sheppard
patent: 4262693 (1981-04-01), Giebeler
patent: 4316596 (1982-02-01), Krober et al.
patent: 4377179 (1983-03-01), Giebeler
patent: 4378931 (1983-04-01), Adams, Jr.
Garvey Charles C.
Odar H. A.
Scott Samuel
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