SUBMERSIBLE PUMPING UNIT Russian patent published in 2018 - IPC E21B43/08 E21B43/14 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pumping equipment for lifting formation fluid from wells complicated by the removal of rock particles. Device comprises located from top to bottom: an electric centrifugal pump, an upper input module, an upper hydroprotection, a two-way electric motor, a lower hydroprotection, a lower input module, an inverted electric centrifugal pump, a shank, a hydraulic drive, a reducer, a slot filter. Hydraulic drive is a housing with a blade on the drive shaft and outlet holes below the blade. Slot filter is equipped with a driven shaft with a brush attached to it and inlet holes in the bottom cover and is covered by a sealing element from below. Reducer is connected at the top with the drive shaft of the hydraulic drive, and below – with the driven shaft of the slot filter. Container with inlet holes at the top is connected to the slot filter.

EFFECT: reliability and service life of the submersible pumping unit is increased due to the continued maintenance of the initial throughput of the slot filter included in its design by its continuous cleaning.

1 cl, 1 dwg