FIELD: engines and pumps.
SUBSTANCE: group of inventions relates to submersible pumping units. Pumping unit for use in the production of fluids from a well comprises a motor unit, a pump unit driven by the motor unit and jointing section connected between the motor unit and the pump unit. Jointing section comprises one or more fluid separation mechanisms, axis, one or more primary mechanical seals, each of which is placed along axis, and one or more back-up shaft axis, each substantially surrounding a respective seal of said one or more primary mechanical seals.
EFFECT: improvement of design due to increased resistance to contamination and wear caused by solids.
19 cl, 7 dwg
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