FIELD: oil production, particularly equipment for well bottom zone cleaning by exerting hydropulsive action on well bottom zone.
SUBSTANCE: device comprises flow distribution with chemical reagent injection channel, nozzle, mixing chamber and pressure accumulator. The pressure accumulator comprises elastic ball and body with contraction tube and diffuser. The second channel with check valve is formed in distributor body. Shutoff valve with differential piston is installed in the first channel. The greater piston diameter faces bottomhole formation zone. Pressure accumulator with elastic ball arranged in lower part thereof is provided with movable seat and return spring resting upon protective grid.
EFFECT: increased oil output from well due to improved collecting properties, possibility of well bottom treatment only through tubing string.
1 dwg
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