Sequential formation tester having three way normally closed val

Details Sequential formation tester having three way normally closed val Sequential formation tester having three way normally closed val

1985-08-19

1987-06-09

Chambers, A. Michael

Fluid handling

Systems

Multi-way valve unit

13762565, 13762548, 251334, 251359, F16K 11048

Patent

active

046713220

ABSTRACT:
In a formation testing apparatus lowered into a well to conduct various tests, an internal hydraulic powered system operates various components. In the present disclosure, an improved valve having metal seats overlayed with an elastomeric material cooperates with valve elements to thereby enhance low power for valve operations. The valve element and mating valve seat cooperate on valve opening or closing to reduce valve power requirements and the forces needed for operation.

REFERENCES:
patent: 874652 (1907-12-01), Bailey
patent: 2250813 (1941-08-01), Rea
patent: 2984450 (1961-05-01), Doe
patent: 3126915 (1964-03-01), Hunt
patent: 3598145 (1971-08-01), Wolfson
patent: 3605804 (1971-09-01), Way
patent: 4408629 (1983-11-01), Lafont

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