Hydraulically controlled safety valve

Details Hydraulically controlled safety valve Hydraulically controlled safety valve

E - Fixed Constructions

21

B

166/41

E21B 43/01 (2006.01) E21B 33/035 (2006.01) F16K 31/124 (2006.01)

Patent

CA 1091577

"Hydraulically controlled safety valve" ABSTRACT OF THE DISCLOSURE 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.

309683

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