FIELD: oil and gas industry.;SUBSTANCE: device is made in form of confuser-diffuser transition, having a Venturi shape with injection slit in contraction zone, and comprises confuser-diffuser, gas feed inlet branch pipe located in contraction zone and communicated with injection slit to create mixing zone in fluid flow. Device comprises stabilising mechanism process mode of gas injection into a stream of liquid fluid drainage assembly in area of slot ejection pressure reduction down to atmospheric value, outlet and fluid mix separator with a valve control for partial selection of high pressure gas recirculation circuit connected with slot injection of gas supply into an intermediate pressure in confuser section located on its generatrix, inlet branch pipe is equipped with gate valve.;EFFECT: use of device to inject low-pressure gas increases efficiency and reliability of ejector at maximum pressure recovery factor.;1 cl, 1 dwg
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