Tester valve

Details Tester valve Tester valve

1992-01-14

1993-07-20

Dang, Hoang C.

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

166325, 175297, E21B 3412

Patent

active

052285162

ABSTRACT:
A reciprocating full flow tester valve is provided with a shock absorber and tolerance adjustment device for absorbing an impact between a power mandrel of the tool and an operating assembly of the tool. An improved hydraulic impedance system is also provided for providing a time delay in telescopingly collapsing movement of the tool when weight is set down on the tool to open the tester valve.

REFERENCES:
patent: Re29471 (1977-11-01), Giroux
patent: 3217817 (1965-11-01), Morrisett et al.
patent: 3499487 (1970-03-01), Barrington
patent: 3860066 (1975-01-01), Pearce et al.
patent: 4044829 (1977-08-01), Jessup et al.
patent: 4063593 (1977-12-01), Jessup
patent: 4064937 (1977-12-01), Barrington
patent: 4083409 (1978-04-01), Barrington
patent: 4295361 (1981-10-01), McMahan
patent: 4319633 (1982-03-01), McMahan et al.
patent: 4458762 (1984-07-01), McMahan
patent: 4579174 (1986-04-01), Barrington
patent: 4582140 (1986-04-01), Barrington
patent: 4624317 (1986-11-01), Barrington

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