Full flow bypass valve

Details Full flow bypass valve Full flow bypass valve

1977-05-02

1978-04-11

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Fluid operated

166325, 166334, 251214, E21B 4312

Patent

active

040834093

ABSTRACT:
A full flow bypass valve comprising mutually telescoping inner mandrel and outer housing members with hydraulic impedance means therebetween to provide a predetermined time delay when the members are relatively telescoped in a first direction and to provide substantially unrestricted relative telescoping movement between the members in the opposite direction. A valve mechanism provides simultaneous closure of bypass ports through the wall of the housing member when the mandrel and housing members reach full telescopic contraction. Pressure responsive means are provided for maintaining the bypass valve in a closed position regardless of internal or external pressures applied thereto.

REFERENCES:
patent: 3087559 (1963-04-01), Hazen et al.
patent: 3664415 (1972-05-01), Wray et al.
patent: 3750752 (1973-08-01), Mott
patent: 3779263 (1973-12-01), Edwards et al.
patent: 3850250 (1974-11-01), Holden et al.
patent: 3856085 (1974-12-01), Holden et al.
patent: 3964544 (1976-06-01), Farley et al.
patent: 3970147 (1976-07-01), Jessup et al.
patent: 4019580 (1977-04-01), Garett

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