Retrievable annulus and tubing flow control valves

Details Retrievable annulus and tubing flow control valves Retrievable annulus and tubing flow control valves

1979-04-13

1981-06-09

Pate, III, William F.

Wells

Packers or plugs

With expanding anchor

166183, 166322, E21B 33128, E21B 3410

Patent

active

042719038

ABSTRACT:
A flow control and safety valve for oil wells where control of flow in the casing annulus is accomplished with a wire-line retrievable device. A basic valve structure provides for control of flow in the casing annulus by means of a control line to the surface. A number of additional functions can be added to the basic valve structure to accomplish control of flow through the tubing string and can accommodate control of dual and triple zone recovery. These additional functions are accomplished by landing additional wire-line retrievable valves within the basic structure whereby independent control of the annulus and tubing string flows is possible, at the same time affording increased flow diameters for a greater volume of production in a given casing size.

REFERENCES:
patent: 2963089 (1960-12-01), Sizer
patent: 3033642 (1962-05-01), Page
patent: 3313350 (1967-04-01), Page
patent: 3958633 (1976-05-01), Britch
patent: 3981358 (1976-09-01), Watkins et al.
patent: 4031955 (1977-06-01), Leder
patent: 4049052 (1977-09-01), Arendt

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