BOREHOLE PUMPING UNIT FOR THE EXTRACTION OF BITUMINOUS OIL Russian patent published in 2022 - IPC E21B43/24 F04B47/00 E21B7/04 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and can be used in the steam-gravity method for extraction of bituminous oils. A borehole pumping unit for the extraction of bituminous oil for a well with an inclined part, with a lower main 1 and an upper additional 2 horizontal trunks turns on a centrifugal pump 6, lowered on a tubing string 5 into an inclined section of wells, the shaft of which is articulated with a rod string 8 using a cone 7 mounted at its lower end, a packer 11 mounted on the tubing string above the pump 6, the upper drive for rotating the rod string 8. The pipe string-shank 12 from the pump reception is located in the upper additional 2 horizontal borehole and is blocked from the outside by a packer 13 in the initial section of the horizontal borehole. In the area between the packer 13 and the pump 6 intake, spring-loaded check valves 16 and 17 are located inside the pipe string-shank. The upper spring-loaded check valve 17 is connected to the borehole space in the deflector wedge 3 installation zone.

EFFECT: increase in the efficiency of the production of bituminous oil reserves with the steam-gravity method for its extraction.

1 cl, 3 dwg