Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1981-04-30
1985-11-05
Leppink, James A.
Wells
Valves, closures or changeable restrictors
Fluid operated
166321, E21B 3410
Patent
active
045507805
ABSTRACT:
A pressure operated safety valve adapted to be mounted in a well tubing for normally being movable to an open position by control fluid supplied from the surface, and which valve is automatically closed when the well pressure reaches a predetermined amount, whereby blowouts of the well are automatically prevented. The valve has locking means therewith which is operable by fluid pressure supplied through the well tubing from the surface for locking the valve open in the event the valve is malfunctioning in its normal operation and a "Storm" choke or other type of safety valve is to be added in the well tubing, or it is desired to temporarily or permanently lock the valve open for any other purpose. Means are also provided for releasing the locking means to return the valve to its normal operating condition if desired.
REFERENCES:
patent: 2162578 (1931-06-01), Hacker
patent: 2998070 (1961-08-01), Tamplen et al.
patent: 2998077 (1961-08-01), Keithahn
patent: 3078923 (1963-02-01), Tausch
patent: 3126908 (1964-03-01), Dickens
patent: 3236255 (1966-02-01), Sizer
patent: 3292706 (1966-12-01), Grimmer et al.
patent: 3310114 (1967-03-01), Dollison
patent: 3398762 (1968-08-01), Fredd
patent: 3470903 (1969-10-01), Scott
Dang Hoang C.
Hydril Company
Leppink James A.
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