PUMP ASSEMBLY FOR OPERATION OF BEDS IN WELL Russian patent published in 2013 - IPC E21B43/14 F04B47/00 

FIELD: oil and gas industry.

SUBSTANCE: pump unit for operation of beds in well contains flow column, liner, packer installed outside liner between beds, submersible pipe with housing to pump bed products with pumping capacity exceeding total formation flow rate, between pump and tail there's a module for sequential operation of beds which includes housing with holes which can be used for communication of the housing to pump input and each bed. For the purpose of beds switching hydraulic control valve group is used for sequential connection of input to each bed to input of the pump which includes at least one piston with sealing and two pistons for movement installed at the shaft and one valve which is connected hydraulically to one bed and piston for movement and opened at preset pressure drop between beds.

EFFECT: simplification of structure, reduction of costs, improvement of reliability.

5 cl, 1 dwg