Well treatment valve

Details Well treatment valve Well treatment valve

1982-01-25

1984-05-29

Pate, III, William F.

Wells

Valves, closures or changeable restrictors

Fluid operated

166222, E21B 3400

Patent

active

044509146

ABSTRACT:
A well treatment valve includes spring means within a spring chamber acting against an actuating rod movable against a valve body to open and close the valve. The spring means is sealed against pressure in an inlet to the valve while a passage communicates between the valve inlet and the spring chamber. The spring means is a gas spring.

REFERENCES:
patent: 1767538 (1930-06-01), Mahan
patent: 2327051 (1943-08-01), Lyons et al.
patent: 3086591 (1963-04-01), Sexton
patent: 3583481 (1971-06-01), Vernotzy
patent: 3713490 (1973-01-01), Watson
patent: 3802507 (1974-04-01), Watson
patent: 3884300 (1975-05-01), Garrett
patent: 3987848 (1976-10-01), Canterbury
patent: 3993129 (1976-11-01), Watkins
patent: 4036297 (1977-07-01), Swihart
patent: 4063594 (1976-06-01), Canterbury
patent: 4260020 (1981-04-01), Nelson

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