초록 ▼

The present invention is a surface controlled gas lift valve designed for high flow rates and used in a subterranean well, comprising: a valve and actuating assembly for sealable insertion in a mandrel. The valve has a variable orifice which alternately permits, prohibits, or throttles fluid flow in

The present invention is a surface controlled gas lift valve designed for high flow rates and used in a subterranean well, comprising: a valve and actuating assembly for sealable insertion in a mandrel. The valve has a variable orifice which alternately permits, prohibits, or throttles fluid flow into the valve, and a detachable and/or remote actuator are disclosed. The valve may be actuated using momentary bursts of hydraulic pressure to the actuating assembly. Variable orifice opening settings are achieved by providing successive bursts of hydraulic pressure to the actuating assembly, which cause a cylindrical cam within the actuating assembly to be indexed between multiple support positions. The orifice valve and the actuator while operatively connected, may be separately installed in or retrieved from the mandrel by either wireline or coiled tubing intervention methods.

대표청구항 ▼

[ What is claimed is:] [1.] A gas lift assembly for use in a subterranean well, comprising:a gas lift mandrel having first and second bores;a valve body with a longitudinal bore therethrough for sealable insertion in the first bore of the mandrel;a variable orifice valve in the valve body for contro

[ What is claimed is:] [1.] A gas lift assembly for use in a subterranean well, comprising:a gas lift mandrel having first and second bores;a valve body with a longitudinal bore therethrough for sealable insertion in the first bore of the mandrel;a variable orifice valve in the valve body for controlling fluid flow through the body; andan actuating assembly removably disposed within the second bore of the mandrel, and provided separate from and adapted to be connected to the variable orifice valve.