FIELD: engineering of equipment for underground extraction of hydrocarbon free-flowing substance.
SUBSTANCE: oil extraction system contains down-pump and driving unit for activating the down-pump. Unit includes combined section of immersed electric engine and preventing device section for isolating electric engine from environment and for accommodating heat expansion of internal oiling liquid, and is a single device. Unit has longitudinal axis and a set of connected apertures for oil intake, positioned at an angle relatively to longitudinal axis. Aperture positioning angle corresponds to mounting angle of driving unit relatively to vertical line in process of filling it with oil.
EFFECT: increased efficiency of manufacture and mounting of down-pump system.
7 cl, 16 dwg
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