METHOD OF PRODUCING FORMATION FLUID WITH HIGH CONTENT OF GAS AND ABRASIVE PARTICLES AND SUBMERSIBLE INSTALLATION WITH MULTI-VORTEX GAS SEPARATOR FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC E21B43/38 F04D13/10 

FIELD: oil industry.

SUBSTANCE: group of inventions can be used in oil production from wells with high content of free gas and abrasive particles by means of electric centrifugal pumps. Proposed method consists in feeding said fluid into gas separator and withdrawing fluid degassed in gas separator into vane pump. Said gas separator and vane pump are driven by an electric motor. Gas separator comprises a shaft, a housing, a protective sleeve installed in the housing, a base with holes installed in series along the flow of the gas-liquid mixture, impeller includes a sleeve with blades mounted on the shaft, a head with channels for passage of separated liquid into the vane pump and holes for gas outlet into the annular space. A separating sleeve is installed in the head of the gas separator, which forms two areas: removal of degassed liquid and removal of separated gas. An annular gap is formed between the outer diameter of the separating sleeve and the protective sleeve, and a cone-shaped diffuser section is made at the inlet of the supply unit in the base. Impeller flow part is made diagonal, sleeve radius increases from inlet to outlet, outer diameter of blades at the impeller inlet is smaller than that at the outlet. At the outlet of the impeller sleeve there is a section for formation of reverse currents in the form of a toroidal cut, by means of which gas bubbles are separated from the main flow with their subsequent enlargement. Impeller bushing is made with hollow section connected by holes with blade grid, in which there is a device for removal of gas caverns from the blade grid to the center, into this hollow section, in the form of ribs.

EFFECT: increased reliability and efficiency of operation of submersible installation with gas separator and vane pump and reduced power consumption of submersible installation.

6 cl, 4 dwg