SUBMERSIBLE PUMPING UNIT Russian patent published in 2019 - IPC F04D13/10 H02K5/132 

FIELD: mining.

SUBSTANCE: invention relates to equipment for pumping production of formation fluid from wells with technical limitations. Submersible pump unit is lowered on load carrying cable (7) into casing string (9) inside additional column (8). Proposed plant comprises load-carrying coupling (1), oil-filled electric motor (2), discharge module (3), check valve (4), pump (5), suction branch pipe (6) and seal (19). Stator (11) of electric motor (2) is enclosed in tight thin-walled shell (14) for protection against formation fluid. In housing (10) of electric motor (2) there is hole (17) communicating its cavity (16) with well, which is blocked by filtering element (18).

EFFECT: invention is aimed at simplifying the submersible pumping unit design and improving its reliability.

1 cl, 1 dwg