Check/relief valve for an inflatable packer system

Details Check/relief valve for an inflatable packer system Check/relief valve for an inflatable packer system

1980-02-11

1982-02-23

Cline, William R.

Wells

Automatic

166325, 137116, 137540, E21B 33127, F16K 1508

Patent

active

043165044

ABSTRACT:
A check/relief valve intended for use in an inflatable packer system. The valve comprises a hollow cylindrical longitudinally extending inner member surrounded by a spring loaded relief piston and a spring loaded check valve poppet, all surrounded by a hollow longitudinally extending outer member.

REFERENCES:
patent: 2203577 (1940-06-01), O'Neill et al.
patent: 2610028 (1952-09-01), Smith
patent: 2875774 (1959-03-01), Banker
patent: 3075589 (1963-01-01), Grable et al.
patent: 3193016 (1965-07-01), Knox
patent: 3439740 (1969-04-01), Conover
patent: 4240255 (1980-12-01), Benilan

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