DEVICE FOR PUMPING GAS-LIQUID MIXTURE TO PRODUCTIVE FORMATION

摘要

FIELD: oil and gas industry. ^ SUBSTANCE: device for pumping gas-liquid mixture to productive formation includes internal pipe string 2 equipped with receiving chamber 3 of liquid and gas, and external pipe string 4 with sealing assembly 5 located from below between pipe strings 2 and 4; the above internal and external pipe strings are arranged in bore pit and concentrically inserted one into another. Receiving chamber 3 of liquid and gas is interconnected with tubing-casing annulus15 of the above sealing assembly 5 and equipped from below with submersible pump 6 the inlet of which is interconnected with space inside bore pit 9, to which liquid is supplied. Submersible pump 6 is of electric screw type, or rotary or centrifugal. Receiving chamber 3 of liquid and gas is made in the form of LP chamber of jet-type pump 10 the inlet of which is interconnected with outlet of submersible pump 6, and outlet 14 - with internal pipe string. Into tubing-casing annulus 15 under pressure there supplied is gas with possibility of its suction to low pressure chamber. ^ EFFECT: improving efficiency of device and improving mixing of gas and water. ^ 1 dwg