Patent ID: 6715550
Filing Date: 2004-04-06
Classification: E21B,H04B,Y10T

Abstract:
A controllable gas-lift well, comprising:a wellbore extending from a first location to a second location; a production tubing positioned and longitudinally extending within the wellbore; an AC power supply electrically coupled to the production tubing near the first location and operable for supplying an AC signal along the production tubing towards the second location; a gas-lift valve coupled to the production tubing between the first location and the second location, the valve being adjustable to regulate the fluid flow between an interior and an exterior of the tubing, the valve being electrically controllable by using the production tubing as a conductor; and a lower impedance device coupled to the tubing, the controllable gas-lift valve being electrically coupled to the tubing above the lower impedance device.