Wells – Valves – closures or changeable restrictors – Destructible element
Patent
1977-02-16
1977-12-20
Leppink, James A.
Wells
Valves, closures or changeable restrictors
Destructible element
166264, 166321, E21B 4312, E21B 4700
Patent
active
040635937
ABSTRACT:
A normally open oil well sampler valve which provides a fully open testing flow path therethrough is presented, wherein the sampler valve is closed under hydraulic control after a predetermined pressure increase in the well annulus pressure. The sampler includes two spaced apart ball valves having a sample chamber therebetween. The operating mechanism moves the ball valves from the open to the closed position simultaneously, and provides a hydraulic lock as well as a mechanical lock to prevent the balls from reopening in the well. The apparatus further includes a circulation valve which is opened after the closing of the sampler valve. One of the ball valves of the apparatus may be selectively removed to provide a single ball, safety closure valve when a well fluid sample is not desired.
REFERENCES:
patent: 3814182 (1974-06-01), Giroux
patent: 3823773 (1974-07-01), Nutter
patent: 3856085 (1974-12-01), Holden et al.
patent: 3858649 (1975-01-01), Wray et al.
patent: 3860069 (1975-01-01), Wray et al.
patent: 3915228 (1975-10-01), Giebeler
patent: 3930540 (1976-01-01), Holden et al.
patent: 3967647 (1976-07-01), Young
patent: 3970147 (1976-07-01), Jessup et al.
Gonzalez Floyd A.
Halliburton Company
Leppink James A.
Tregoning John H.
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