Variable orifice gas lift valve for high flow rates with detacha

Fluid handling – Diverse fluid containing pressure systems – Gas lift valves for wells

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1661175, E21B 3406

Patent

active

060706082

ABSTRACT:
The present invention is a surface controlled gas lift valve designed for high flow rates and used in a subterranean well, comprising: a valve for sealable insertion in a mandrel, having a variable orifice which alternately permits, prohibits, or throttles fluid flow into the valve, and a detachable and/or remote actuator are disclosed. Methods of actuating the valve include electro-hydraulic, hydraulic, and pneumo-hydraulic, while sensors relay the position of the variable orifice and critical fluid pressures to a panel on the surface. The orifice valve and the actuator while operatively connected, may be separately installed in or retrieved from by either wireline or coiled tubing intervention methods.

REFERENCES:
patent: 3280914 (1966-10-01), Sizer et al.
patent: 4239082 (1980-12-01), Terral
patent: 4705062 (1987-11-01), Baker
patent: 5172717 (1992-12-01), Boyle et al.
patent: 5176164 (1993-01-01), Boyle
patent: 5469878 (1995-11-01), Pringle
patent: 5535767 (1996-07-01), Schnatzmeyer et al.
patent: 5782261 (1998-07-01), Becker et al.

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