Subterranean well valve with lock open mechanism

Details Subterranean well valve with lock open mechanism Subterranean well valve with lock open mechanism

1981-02-09

1983-10-25

Pate, III, William F.

Wells

Valves, closures or changeable restrictors

Fluid operated

166 72, 166375, E21B 3410

Patent

active

044113161

ABSTRACT:
A subterranean well valve assembly includes a valve mounted within an annular housing which is actuated by an annular plunger co-axially mounted within the housing. The plunger is longitudinally shiftable to open the valve, in response to a fluid pressure signal. Within the housing, releasable latches are provided for engaging an annular groove, thereby temporarily locking the plunger in its lower position. The valve assembly also includes a permanent lock open mechanism comprising an annular locking mandrel, including a latch element. Longitudinal movement of the mandrel locks the mandrel in place, thereby interfering with subsequent retraction of the plunger from locked position.

REFERENCES:
patent: 2447842 (1948-08-01), Cameron et al.
patent: 3786865 (1974-01-01), Tausch
patent: 3995692 (1976-12-01), Seitz
patent: 4088298 (1978-05-01), Brown

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