Hydraulically controlled safety valve

Details Hydraulically controlled safety valve Hydraulically controlled safety valve

1978-08-24

1981-10-27

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

91 5, 91461, 60413, F16K 3112, F16K 31122

Patent

active

042969107

ABSTRACT:
A safety valve is mounted on an underwater oil well and is remote-controlled from a central control station. The control station is connected to a receiving station, where the valve is disposed, via a single small-section hydraulic line which feeds, at a low rate of flow, a hydropneumatic accumulator for supplying an operating jack of the valve. A manostat switch at the receiving station controls a feed/bleed hydraulic relay of the jack in dependence on the pressures measured in the line at the receiving station. The invention finds application in oil valve safety operations.

REFERENCES:
patent: 2900960 (1959-08-01), Gratzmuller
patent: 2948262 (1960-08-01), Gratzmuller
patent: 3252381 (1966-05-01), Gratzmuller
patent: 3613070 (1971-10-01), Jones et al.
patent: 3814375 (1974-06-01), Grotloh
patent: 3906726 (1975-09-01), Jameson
patent: 3963039 (1976-06-01), Coeurderoy
patent: 4036106 (1977-07-01), Athy, Jr.
patent: 4141533 (1979-02-01), Goodman

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