Patent ID: 6672392
Filing Date: 2004-01-06
Classification: E21B

Abstract:
A method of recovering natural gas from a well in a multiple phase gas recovery cycle which includes a liquid capture phase in which pressurized gas moves liquid from the well into a production chamber defined within a production tubing inserted into the well; a liquid removal phase in which pressurized gas lifts liquid from the production chamber out of the well through a lift chamber defined by a lift tubing inserted at least partially within the production chamber; and a production phase during which natural gas is removed from the well in a casing chamber defined by a casing within the well and the production tubing and during which natural gas is pressurized and is thereafter flowed into and through the production chamber and the lift chamber for delivery to a sales conduit; and a three chamber evacuation phase executed by:applying relatively low pressure within the casing chamber, production chamber and lift chamber after completion of the production phase and before execution of the liquid capture phase.