PUMP UNIT FOR PRODUCTS LIFT ALONG THE CASING STRING Russian patent published in 2017 - IPC F04D13/10 

FIELD: oil and gas industry.

SUBSTANCE: pump unit for the formation products lift along the casing string includes a packer (19), short shank (5), electrical submersible pump (1) with a head (12) for connection to the steel cable (13), pumping fluid from underpacker space (24) of the well to overpacker space (26) through the check valve (4), power cable (3) and pressure sensors (25-27), measuring pressure in the cavities of above and below the packer. The pump (1) is disposed above the packer (19). The packer (19) is made with polished bushing (18) and keys (20). The pump suction (1) through the shank (5) connects with a pin (15), equipped with external keys (17), mating keys (20) of the packer (19) and adapted to sealing entry into a polished bushing (18) of the packer (19).

EFFECT: simplification of the unit design, which allow to take it out from the borehole easy and free, to measure the pressures required for the operation.

8 cl, 4 dwg