FIELD: oil and gas producing industry. SUBSTANCE: electrical centrifugal pump consists of downhole motor 1, hydroprotection 2, pump 3. Pump discharge is made in form of ejector device which includes nozzle 4, mixing chamber 5, diffuser 6. Motor is supplied through cable 7. Channel 8 for bypassing the gas from annular space 9 is made at the level of mixing chamber 5. The channel is provided with check valve 10. During operation of pump 3, the produced fluid is directed through nozzle 4 to create rarefaction in the region of mixing chamber 5 and to cause valve 10 open and to bypass the gas from annular space 9 to mixing chamber. Gas becomes mixed with produced fluid and enters diffuser 6 and further on to wellhead. EFFECT: higher efficiency. 1 dwg
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