Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1981-01-06
1983-09-13
Pate, III, William F.
Wells
Valves, closures or changeable restrictors
Fluid operated
166386, E21B 3414
Patent
active
044036574
ABSTRACT:
A valve for landing in a landing nipple which landing nipple includes an actuator for the valve with the valve including radially expansible locking means for locking the valve to the landing nipple and to the actua
REFERENCES:
patent: 3744564 (1973-07-01), Moh
patent: 3763937 (1973-10-01), Dinning
patent: 4044835 (1977-08-01), Moh
patent: 4071088 (1978-01-01), Moh
patent: 4256180 (1981-03-01), Moh
patent: 4294315 (1981-10-01), Yonkers et al.
Otis Engineering Corporation
Pate III William F.
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