FIELD: oil industry.
SUBSTANCE: invention is intended for use in oil industry and can be used for removal of asphalt-resin-paraffin deposits from a tubing string of the well and internal cavity of the deep-well pump. When implementing the method, the tubing string of wells with electric centrifugal pump (ECP), inverting and bypass valve, are pumped solvent in. For rinsing with a reagent of a deep-well pump, the solvent is pumped to the tubing string, the tubing string is filled and the solvent is directed to the annular space of the well through the bypass valve for accumulation above the deep-well pump. Using frequency inverter, smoothly increasing current frequency of submersible motor of plant, ECP is actuated with efficiency providing transportation of solvent from annular space from top to bottom in electric centrifugal pump cavity through its receiving holes, wherein said procedure for solvent supply to pump is repeated several times for total removal of asphalt-resin-paraffin deposits.
EFFECT: rational use of organic solvent.
1 cl, 1 dwg
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