SUBMERSIBLE PUMP WITH BYPASS FOR LIQUID INJECTION Russian patent published in 2021 - IPC E21B34/06 E21B43/00 F04B47/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, and in particular to devices for lifting to the day surface of products from wells with the possibility of pumping liquid into the sub-packer space in downhole conditions. A submersible pump with a bypass channel for liquid injection comprises a submersible borehole pump lowered on a pipe string, equipped with a liner at the bottom and a bypass channel communicated with the liner and the inner space of the pipe string above the pump. The bypass channel is equipped with a spring-loaded adjustable valve that closes the fluid flow in the bypass channel between the liner and the internal space of the pipe and maintains the pressure in the pipe string arising from the pump operation. The liner is equipped with a packer externally positioned above the reservoir. An overflow channel is made inside the liner, which communicates above the packer and subpacker spaces of the well and is equipped with a bypass spring-loaded valve that opens only at excessive pressure in the subpacker space during fluid injection through the bypass channel.

EFFECT: providing the ability to pump fluid into the formation through the pipe string without removing the pump and flushing the bottomhole zone.

1 cl, 1 dwg