Well injection valve with retractable choke

Details Well injection valve with retractable choke Well injection valve with retractable choke

1985-03-11

1986-07-22

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166319, E21B 4312

Patent

active

046013423

ABSTRACT:
An injection valve for use in a well conduit for injecting fluids into the conduit having a housing with a bore and a valve closure member in the bore moving between open and closed positions. A flow tube is telescopically movable in the housing for controlling the movement of the valve closure member and moves downwardly to open the valve closure member and is biased upwardly for closing the valve closure member. A variable, radially retractable choke is connected to the flow tube and extends into the bore for moving the flow tube downwardly in response to fluid injection, but contracts to allow passage of well tools through the valve. The flow tube may include a no-go shoulder and a releasable lockout may be provided between the flow tube and the housing.

REFERENCES:
patent: 2162578 (1939-06-01), Hacker
patent: 3743015 (1973-07-01), Mott
patent: 4215748 (1980-08-01), Pace et al.
Camco, Incorporated 1980-1981 General Equipment Catalog (pp. 1370-1371).

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