PLANT FOR WATER-ALTERNATED-GAS FORMATION STIMULATION Russian patent published in 2025 - IPC E21B43/20 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to a plant for water-alternated-gas formation injection. Proposed plant comprises power pump in water feed line and gas blower in gas feed line. Plant is equipped with in-series installed pressure gauge and flow meter with thermal sensor, for supply of water and gas to ejector pump respectively. Besides, it includes booster pump for water-gas mixture supply from ejector pump to injection wells for pumping to the formation. Besides, it includes buffer tank for gas collection and dosing pump. Water supply line is equipped with an inlet flow meter and a pressure gauge and an outlet pressure gauge located respectively before and after the ejector pump; the gas supply line is equipped with a check valve. All pressure gauges, flow meters and temperature sensors for transmitting information are functionally connected to the control unit, which generates a control signal for the gas injector and the metering pump based on this information, to obtain a water-gas mixture with optimal parameters determined by the process parameters loaded into the control unit, for injection through injection wells into the formation. Before pumping to injection wells the water supply line is equipped with a water-distributing battery-comb. Besides, it is equipped with inlet and outlet shut-off valves controlled for opening and closing by control unit and arranged along fluid flow ahead of inlet flow meter and behind booster pump. Booster pump outlet is additionally equipped with pressure gauge also connected to control unit, and bypass line connecting inlet valve inlet and outlet valve outlet of water supply line to at least one valve controlled for opening and closing by control unit. Ejector pump is installed on water supply line and connected to gas supply line. Booster pump is installed on the water supply line after the ejector pump and is connected to the output of the tank for the foaming surfactant, which supplies in the required amount by a signal from the control unit to the water supply line to the inlet of the ejector pump to obtain a more dispersed state of the water-gas mixture and better retention of gas in it when pumping into the formation. Buffer tank is equipped with liquid level meter connected to control unit, and is installed on gas supply line at outlet of gas compressor, at inlet of which there is a manual gate valve to cut communication with low-pressure gas feed lines. Shutoff element controlled by control unit is arranged at buffer tank outlet to feed required amount of gas into ejector pump.

EFFECT: creation of installation for water-alternated-gas injection to formation, making it possible to perform pumping of liquid at necessity of repair or maintenance of equipment due to availability of bypass line connected to operation and to protect gas equipment against backflow of liquid due to its automatic disconnection from water supply line.

1 cl, 1 dwg