METHOD OF CYCLIC GASLIFT LIQUID PRODUCTION Russian patent published in 2009 - IPC E21B43/16 

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production, particularly oil and gas wells production in condition of low reservoirs pressures. Method includes gas supply into tubing string and gas-liquid mixture lift in the tubing string. Locate tubing string of smaller diametre inside of the tubing string. On a surface install piston pump-compressor with injection and suction valves, right side of its piston cavity connect to tubing sting of smaller diametre, and left side - with tubing string of bigger diametre, install parker at the end of it. When pistons moves to the right, supply gas into tubing string of smaller diametre, and simultaneously create sub atmospheric pressure, which generates required density liquefied mixture, and lift it through out tubing string of bigger diametre. When piston moves to the left transmit pressure on gas-liquid mixture in order to pressurise it. During liquid process create unevenness in gas or gas-liquid mixture supply with piston pump-compressor by transmitting pressure impulses through well liquid column to bottom hole zone.

EFFECT: possibility of creating effect on stratum, power consumption decrease, can be used not only for wells with low production rate, use of simple equipment.

1 dwg