METHOD OF GAS-LIFT OIL EXTRACTION USING ENERGY OF ASSOCIATED GAS COMBUSTION IN WELL Russian patent published in 2013 - IPC E21B43/12 E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: method lies in accumulation of liquid and gas in a well, cyclic carryover of accumulated liquid from the liner to tubing string and throwing of liquid column by gas. According to the invention associated gas is separated from liquid-gas mixture and directed to the upper part of gas-lift unit to gas burning unit. Air under high pressure is fed to the same unit in order to provide conditions for gas-air mix burning ensuring high-speed burning process accompanied by sharp increase of temperature and pressure. In result it provides opening of return valve in the lower part of tubing string and throwing of liquid column by gas being a combustion product. Thereafter cycle of gas separation from liquid-gas mixture and its burning in gas-air mix is repeated as far as liquid and gas enter through the service valve from annular space to the lower part of submerged gas-lift unit at receipt of a signal from the earth control station.

EFFECT: increase in efficiency, reduction of power consumption, control of production process and reduction of costs for well operation.

1 dwg