FIELD: machine building.
SUBSTANCE: invention relates to petroleum industry and may be used for pumping out of formation fluid from wells with high content of gas. Submersible multi-phase pump impeller comprises n-number of stages. At least one stage has semi-open impeller (9) with drive disc (10) and blades (11), top and bottom guide vanes (1), (5), installed respectively before and after impeller (9). Each device (1), (5) includes lower disc (2) and (6) and top plate (3) and (7) with blades (4), (8). Between wheel (9) and upper disc (3) of lower unit (1) there is additional guide vanes (12), which consists of disc with blades (13). Availability of additional device (13) makes it possible to remove part of liquid passing through the impeller (9), and send to input of same wheel (9), thus, forced increasing content of liquid in passing through stage of gas-liquid mixture.
EFFECT: as a result of stable operation of pump and increases its head and efficiency.
6 cl, 6 dwg
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