DOWNHOLE ROD PUMP UNIT Russian patent published in 2022 - IPC F04B47/02 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and can be used for the development and operation of oil wells. The downhole rod pumping unit comprises a drive 1, a tubing string 2, a traction body, a cylinder with a suction valve 10, a plunger 5 with a discharge valve 6 located in the cylinder, a radial channel communicating the cavity of the cylinder with the space 11. The drive 1 is made of a reversible long-stroke . The traction body is composed of a flexible traction element 3 associated with the drive 1, and a column of rods 4 associated with a single-stage hollow plunger 5. The cylinder is made single-stage in the form of a cylinder string, muffled at the lower end. The valve 10 is installed between the lower and upper parts 7 and 8 of the cylinder string and is made lateral, communicating the cavity of the cylinder string with space 11.

EFFECT: invention is aimed at improving the efficiency of the downhole rod pumping unit.

1 cl, 1 dwg