FIELD: production of gas-liquid fluids from wells, particularly, gas-cut oil. SUBSTANCE: device may be used in operation of water, oil, gas-condensate and gas objects in wells by flowing conditions or by artificial injection of gas for lifting fluid to surface. The device includes tubing for lifting of fluid and gas and units accommodated inside tubing string for varying structure of gas-liquid flow. Said units are made in the form of check ball valve whose ball radius and weight are selected depending on velocity of gas-liquid flow by analytical formulas. EFFECT: reduced gas consumption and higher efficiency of fluid lifting in wells. 2 cl, 5 dwg
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