METHOD FOR SUPPLYING ASPO SOLVENT INTO WELL Russian patent published in 2021 - IPC E21B37/06 

FIELD: oil industry.

SUBSTANCE: invention is intended for use in the oil industry and can be used in the operation of wells, in the lift pipes of which various kinds of deposits are formed, for example, asphalt-resin-paraffin deposits. Before pumping process fluids into the well in the tubing string above the pump and at the wellhead, moisture meters are installed, the tubing string at the wellhead is equipped with a flow meter, and the electric centrifugal pump and submersible electric motor are placed in a cylindrical casing with an open bottom. A reference liquid - mineral water is supplied to the annular space of the well from the wellhead; according to the indications of moisture meters and a flow meter, the volume of deposits and the volume of solvent required to fill the pipe string are determined. The injection of the solvent and backbone oil after the reference fluid is carried out until the solvent appears at the wellhead. Injection of process fluids is carried out with an operating deep pump with a volumetric flow rate equal to the productivity of the downhole pump.

EFFECT: efficiency of flushing the tubing and the electric centrifugal pump with an organic solvent is increased by organizing the control of the complete filling of the pipes and the pump with solvent, and the rational use of the organic solvent is ensured.

1 cl, 2 dwg