Gas lift conduit apparatus for increasing effective depth of gas lift

摘要

A conduit means 30a eg a coiled tubing, is located within production tubing 12a and has an inlet 32a at one end and outlet operating valve 34a at the other end. The inlet 32a allows communication between the conduit means and a wellbore annulus (18, figure 1a) and the introduction of a liftgas. The liftgas exits the tubing 30a via outlet 34a giving a lower effective injection point and therefore increasing the well flow rate. The apparatus 11a may be inserted or retrieved from a well 10a by conventional means such as wireline or coil tubing. An alternative embodiment employs a sliding sleeve assembly that incorporates ports, seals and sliding doors at the inlet to the production tubing.