METHOD OF GAS-LIFT OPERATION OF WELL Russian patent published in 1998 - IPC

FIELD: oil-and-gas producing industry; applicable in production of fluid from well with large well stream watering and low formation and bottom-hole pressures. SUBSTANCE: method includes supply of working gas to well with provision of its supply to hollow of tubing. Gas-fluid mixture is lifted through tubing. Tubing string is provided with packer. Installed above packer is jet pump. Installed concentrically inside tubing string is additional short pipe string with working coupling in its lower part. Working gas is supplied to tubing hollow through space between additional pipe string and tubing string through holes of working coupling. Supplied at the moment of stabilization of gas-fluid mixture at tubing outlet, to annular space above packer, is degassed fluid under pressure for engaging jet pump which pumps fluid bottom-hole zone to working coupling. EFFECT: higher productivity of gas-lift without increasing the gas pressure in annular space of well. 1 dwg