FIELD: engines and pumps.
SUBSTANCE: this system is used for transfer of fluids from deep wells. Said pump is equipped with bearings and bushes that feature optimum working stroke with duel allowance for such operating conditions as load, stroke, pressure and tension. Besides, said bearings and bushes are engaged with drive string to facilitate efficient installation and dismantling. Said bearings or bushes are not secured to flow string or drive string. In compliance with invention versions, said drive string can be perforated while extracted fluid can be used for lubing of the system bearings.
EFFECT: stable revolution, ease of repair and servicing.
4 cl, 13 dwg
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