| 摘要 |
FIELD: production of oil from low-debit wells. SUBSTANCE: pump is provided with drain and check valves, fishing head, sections, inlet module or gas separator and submersible electric motor equipped with hydraulic protection which are connected in series. Pump sections consist of main section, bearings 13, stages of impellers and apparatus 14. Located in lower section between lower apparatus 14 and bearing 13 is branch pipe 11 with radial through holes 12 provided near bearing 13. Pump housing has row of through radial holes 15 below lower apparatus 14 which are located above holes 12 in branch pipe 11. EFFECT: enhanced reliability. 2 dwgw
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