Abstract: The present invention is addressed to a method of retro-fitting a well installation to reconfigure it to provide plunger enhanced chamber lift. The method comprises the steps of providing a reel-carried supply of coil tubing, a primary seating nipple assembly, a primary seal assembly, a primary seal, a receiver housing, and a secondary seating nipple. The receiver housing is connected with the coil tubing, and the coiling tube snubbed until the primary seal engages the primary seating nipple. A wire installable and retrievable sealing plug is provided and installed within the receiver housing. The wellhead is modified to supply gas under pressure into the secondary annulus and the sealing plug is removed. A check valve assembly is provided and positioned within the coiling tube such that the secondary seal engages the secondary seating nipple. A reciprocally moveable plunger is provided and installed within the coiling tube.

Abstract: Method for operating a well installation utilizing a chamber in operative association with plunger lift to carry out deliquidfication. Injection gas may be employed for plunger lift in a manner wherein the injection channel is isolated from the primary annulus of the well adjacent the casing. Gas is produced through that primary annulus.

Abstract: A method for producing a plunger lift well which optimizes production through the evaluation of the speed at which a plunger arrives at the wellhead within a fixed on-cycle interval. Time interval windows representing fast, good, and slow plunger performance are established and, based upon plunger performance with respect to these windows, afterflow time and off-cycle intervals are varied toward an achievement of plunger arrivals within the good window. A minimum off-time is established as a limit. The method may be employed with two motor valves, one performing in conjunction with a sales and the other to low pressure such as the atmospheric pressure of a tank or a low pressure sales line. In the event of failure of the plunger to arrive within the on-cycle interval, resort is made to the tank cycle. Additionally, an afterlow delay cycle is provided as well as a delay cycle intended for response to high sales line pressure conditions.