Patent Number: 6,305,402

Title: Variable orifice gas lift valve for high flow rates with detachable power source and method of using

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.

Inventors: Pringle; Ronald E. (Houston, TX)

Assignee: Camco International Inc.

International Classification: E21B 34/00 (20060101); E21B 34/06 (20060101); E21B 43/12 (20060101); F04F 001/20 ()

Expiration Date: 10/23/2018