Slurry tolerant pilot operated relief valve

Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator

Reexamination Certificate

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Details

C251S062000

Reexamination Certificate

active

07467778

ABSTRACT:
Cartridge-style fluid control devices are provided that are static pressure independent and capable of repeatable, reliable, particulate insensitive performance in service conditions typical of downhole intervention environments.

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EP Search Report #RS 110659 dated Apr. 23, 2004, 2 pgs.
PCT International Search Report & Written Opinion dated Jan. 13, 2005, 5 pgs.

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