Patent ID: 6491105
Filing Date: 2002-12-10
Classification: E21B,Y10T

Abstract:
A cross-over housing for a production pressure operated gas lift valve for controlling the through-flow of production fluids and casing gas, the gas lift valve having a pressure chamber and a pressure chamber valve, the cross-over housing comprising:a side wall, a lower surface area and an upper surface area; a casing gas through-opening providing fluid communication between said side wall and said upper surface for receiving pressurized casing gas; and a substantially continuous production fluid through-opening for providing fluid communication between said lower surface area and said upper surface area, said through opening having a geometric configuration wherein the area of said production fluid though-opening is of sufficient size so as to avoid critical flow of gas when the pressure chamber valve is unseated, thereby permitting the gas lift valve to sense the pressure drop in the tubing, and thereby allow the gas lift valve to reseat.