FIELD: oil and gas industry.
SUBSTANCE: pump is installed in tubing strings at the outlet of a submersible pump unit for oil extraction. A pump includes a nozzle, a receiving chamber, a mixing chamber, a diffuser and a check valve connected to the receiving chamber and to annular space through bypass channels. The check valve is arranged above the nozzle. The mixing chamber is made in the form of channels diverging at the beginning and converging at the end of the mixing chamber.
EFFECT: invention allows increasing a homogenisation degree of a mixture of working and ejected liquid without any increase of an overall length leading to increase of metal consumption of the structure.
2 cl, 3 dwg
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