Methods for determining the technological parameters of an advanced jet well installation

Abstract

The article considers the use of a jet pump design with separate workflows for the production of high-viscosity oil. The authors have developed an improved design of a jet well unit with separate workflows, in which the working fluid, moving through the inner annulus, reaching the pump housing, is divided into two streams. A portion of the working mixture - 40% (depending on the cross section of the nozzle of the twisting chamber) enters the twisting chamber of the hydrodynamic cavitator, via which the working fluid passes, creating gas bubbles. These bubbles flake under the action of external pressure at the outlet of the chamber when the liquid passes through a stepped diffuser. The second portion of the working mixture - 60% (depending on the cross section of the jet nozzle) enters the pump nozzle, where flowing at high speed, forms a zone of reduced pressure, resulting in the mixture and oil from the subpacker enter the mixing chamber of the device. We have considered the conditions that can provide the effect of gushing, taking into account the fact that with the use of jet devices can achieve this effect. There may be two cases: 1) the extraction of fluid from wells is limited; 2) the extraction of fluid from wells is unlimited. The initial data, technological parameters and the sequence of their determination are given for the variant when light oil is used as a working liquid, and the working pressure of the surface power plant is not set. Determining the technological parameters of the well unit is a solution to the direct problem, and then - the reverse one. The improved method for calculating the technological parameters of a jet well unit with separate workflows, the design of which has no analogues in Ukraine, is proposed. This technique has been tested during industrial tests of a prototype of an equipment set for the extraction of high-viscosity oils. The method of operation of the pumping-ejector downhole jet unit with a hydrodynamic pulsator for the extraction of high-viscosity oils is protected by a patent of Ukraine.