Full bore sampler valve apparatus

Details Full bore sampler valve apparatus Full bore sampler valve apparatus

1984-09-24

1985-11-19

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Destructible element

166264, 166321, E21B 4312, E21B 4200

Patent

active

045535981

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a full-bore sampler and safety valve apparatus includes a housing having an actuator mandrel slidably arranged therein, axially spaced normally open ball valve elements mounted on the mandrel assembly and cooperable with fixed eccentric pins on the housing for simultaneously closing a flow passage extending through the housing when the mandrel assembly is shifted from one axial position to another, a hydraulically operable piston on the mandrel assembly normally subject to balanced pressures, and means responsive to a predetermined pressure of fluids in the well annulus for exposing the hydraulically operable means to well pressure to cause shifting of the actuator mandrel assembly and simultaneous closing of the ball valve elements.

REFERENCES:
patent: 3071193 (1963-01-01), Raulins
patent: 3308887 (1967-03-01), Nutter
patent: 3388745 (1968-06-01), Cole
patent: 3856085 (1974-12-01), Holden et al.
patent: 4063593 (1977-12-01), Jessup
patent: 4125165 (1978-11-01), Helmus
patent: 4144937 (1979-03-01), Jackson et al.
patent: 4270610 (1981-06-01), Barrington
patent: 4286662 (1981-09-01), Page, Jr.

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