Blowout protector

Details Blowout protector Blowout protector

1985-07-11

1987-03-03

Cohan, Alan

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251172, 251175, 251193, 251327, F16K 31122, F16K 300, E21B 3306

Patent

active

046470050

ABSTRACT:
A blowout protector for use between sections of well tubing at a well head comprises a flat rectangular housing having top and bottom plates with aligned openings connected to the respective tubing sections, the housing defining an internal chamber. A closure plate is movable piston-wise within the chamber between respective terminal positions at opposite ends of the chamber. The closure plate has an opening therein which aligns with the respective openings in the top and bottom plates when the closure plate is in one terminal position in order to allow well fluid to flow through the protector. In the other terminal position the closure plate forms a barrier to fluid flow through the housing. Fluid pressure inlet and exhaust ports are provided at opposite ends of the housing for moving the closure plate between its respective positions. The housing also incorporates pressure seals for the closure plates and means for automatically increasing the pressure exerted by one of the seals on the closure plate when the closure plate is in flow-blocking position.

REFERENCES:
patent: 1153973 (1915-09-01), Tacit et al.
patent: 2726842 (1955-12-01), Seamark
patent: 3367625 (1968-02-01), Fortune
patent: 3463193 (1969-08-01), Yost
patent: 4078579 (1978-03-01), Bucko, Sr.

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