Selection of Optimal Design of a Universal Device for Nonstationary Pulse Pumping of Liquid in a Reservoir Pressure Maintenance System

A universal downhole device for continuous pulsed pumping of liquid in a reservoir pressure maintenance system is developed. A mathematical model of the device and a derivation of expressions for determining the main basic working output parameters are given. The results of theoretical studies are compared with bench tests of the device. The effectiveness of the device in non-stationary flooding in the pressure maintenance system is demonstrated based on previously conducted scientific studies. Preliminary positive data on commercial use of the device at Rosneft oil fields in 2015-2016 are given.