Standing valve

Details Standing valve Standing valve

1989-04-20

1990-08-28

Neuder, William P.

Wells

Valves, closures or changeable restrictors

Fluid operated

166332, 166373, E21B 3410

Patent

active

049517520

ABSTRACT:
A standing valve assembly providing a large cross-sectional flow area to reduce flow restrictions while in a production mode. A preferred embodiment of the valve is capable of movement in a valve alignment guide from a normally biased open position. The normally biased open position provides a large flow area. When removal of accumulated fluid in a wellbore is required, gas-lift gas closes the valve to isolate the producing formation allowing the fluid to be lifted from the wellbore. After removal of the fluid is completed and the gas-lift is stopped, the valve returns to its normal open position to allow flow through the valve assembly.

REFERENCES:
patent: 248637 (1881-10-01), Crowley
patent: 1844074 (1932-02-01), Ricker
patent: 1927081 (1933-09-01), Bryan
patent: 2071639 (1937-02-01), Long
patent: 3888273 (1975-06-01), Douglas
patent: 3970145 (1976-07-01), Boyd
patent: 4352366 (1982-10-01), Fisher
patent: 4390061 (1983-06-01), Short
patent: 4470464 (1984-09-01), Baldenko et al.
patent: 4519457 (1985-05-01), Holland et al.
patent: 4691777 (1987-09-01), Williamson
patent: 4700783 (1987-10-01), Baron

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