Casing joint assembly for producing an annulus gas cap

摘要

A casing joint assembly and methods for producing an annulus gas cap using the casing joint assembly. The casing joint assembly comprises a first valve and a second valve to control fluid pressure in the sealed annulus between the casing string and a wall of the well bore or another casing string.

主权项

1. A method for producing an annulus gas cap, which comprises:
lowering a work string into a casing string and through one end of a casing joint assembly; connecting the work string to a first valve or a second valve and a valve actuator; opening the first valve and the second valve using the work string and the valve actuator; injecting a compressible gas through the work string and the first valve or the second valve into an annulus between a well bore wall and the casing joint assembly to form the annulus gas cap; and displacing a portion of a fluid in the annulus through the first valve or the second valve into another annulus in the casing string.