Well injection valve retrievable choke

Details Well injection valve retrievable choke Well injection valve retrievable choke

1991-10-07

1993-03-02

Britts, Ramon S.

Wells

Valves, closures or changeable restrictors

Fluid operated

166323, 251 94, E21B 4312

Patent

active

051901064

ABSTRACT:
An injection valve for use in a well having a valve closure element positioned below a valve seat moving between an open position to a closed position on the valve seat for blocking off upward flow through the bore, but allowing downward flow. A flow tube is telescopically movable in the housing for controlling the movement of the valve closure member and a piston is movable in the housing and connected to the flow tube and exposed to fluid in the bore. An upwardly facing shoulder on the flow tube receives a retrievable orifice member for providing a force for fully opening the valve when fluid is injected downwardly through the bore. A retrievable lockout sleeve is provided to lock the valve open when the retrievable orifice is removed.

REFERENCES:
patent: 3981358 (1976-09-01), Watkins et al.
patent: 3993129 (1976-11-01), Watkins
patent: 4215748 (1980-08-01), Pace et al.
patent: 4276937 (1981-07-01), Calhoun et al.
patent: 4291722 (1981-09-01), Churchman
patent: 4411316 (1983-10-01), Carmody
patent: 4585067 (1986-04-01), Blizzard et al.
patent: 4601342 (1986-07-01), Pringle

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