BOREHOLE SUCKER ROD PUMP UNIT Russian patent published in 2017 - IPC F04B47/02 

FIELD: oil and gas industry.

SUBSTANCE: unit contains power drive with traction body, reversible drive body, two balanced lifting liquid lines of different weights, including the corresponding suspension, connected to a reversible drive body by a flexible element, polished rods, rod strings and pumps, placed in the appropriate pipe strings, isolated from each other, lowered into the borehole. Reversible driving body is connected to the actuator for rotation and reciprocation together with the traction body. The reversible drive body is equipped with a drum having flexible rod, adapted to be wound around the drum, while the reversible drive body is rotating. The other end of the flexible rod is fixed at a different level within the height of the actuator at the mounting mechanism, which is adapted for fixation relative to the hole top. The drum is adapted to wind the flexible rods with sequential increase or decrease of the winding diameter, respectively for increasing or decreasing of the uplift lines stroke relatively to the actuator stroke.

EFFECT: expanded mounting possibilities and reduced power consumption, excluded the plant downtime, increased operational reliability.

4 cl, 6 dwg