FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to the field of reciprocating submersible pump plants for extraction of formation fluids mainly in oil production and, in particular, to protection of installations against dynamic loads occurring in non-standard operation modes. According to the method, dynamic loads are compensated in at least one of its movable part extreme points. For this purpose, at least in one of the outermost points of linear inverter electric motor movable part stroke, at least one hydromechanical dynamic load compensation device is installed. This device includes cylindrical cavity with bypass holes, movable hollow piston and mating support element. Liquid from the environment of the pump unit is used as a working liquid for the device. Pressure created by working fluid in cylindrical cavity of hydromechanical device is set taking into account values of design characteristics of spring element installed between movable hollow piston and mating support element.
EFFECT: reduction of dynamic loads on elements of linear inverter electric motor structure, increase in overhaul life and total service life of submersible pump unit.
6 cl, 3 dwg
