Sub-surface gate valve

Details Sub-surface gate valve Sub-surface gate valve

1978-05-08

1980-02-12

Nilson, Robert G.

Fluid handling

Systems

Plural noncommunicating flow paths

166319, 251 58, 251327, F16K 302, F16K 31524

Patent

active

041878760

ABSTRACT:
The gate for each conduit, of a preferably multiple conduit installation is transversally slidably mounted between full skirts. Dual hydraulic actuators drive a transversally extending rolling cam follow pin along an oblique path to slide the gate open and closed. The actuators have spring-assisted closure for fail safe operation, the actuator pistons being isolated from well pressure. Where there are two conduits so valved, the actuators for one extend longitudinally upwards from a central bulkhead, and the actuators for the other extend longitudinally downwards. Stem packing for the actuator piston rods is located in the central bulkhead. Modifications for accommodating, e.g. a third valved conduit are described. Also disclosed is a version with two, mutually inverted commonly housed gate valves controlling the same conduit.

REFERENCES:
patent: 2503469 (1950-04-01), Caldwell
patent: 4029289 (1977-06-01), Miffre

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