FIELD: oil production, particularly to stimulate oil production by repeated hydroimpulsive reservoir treatment.
SUBSTANCE: device comprises flow string 1, implosion chamber 11 with piston arranged in it. Upper implosion chamber 11 is communicated with expanded pipe 9 provided with windows 10. Lower implosion chamber end has spring-loaded valve 13. Valve 13 is arranged in body 12 having windows 14 and pressure raisers 15. Device also has hydraulic cylinder 4 installed between flow string 1 and expansion pipe 9. Arranged in hydraulic cylinder 4 is piston 5 secured to piston 8 of implosion chamber 11 and spring-loaded with return spring 17 from top thereof. Blind side of hydraulic cylinder is communicated with hole annuity. Rod end of hydraulic cylinder is provided with pipeline 16 for working liquid delivery from flow string 1.
EFFECT: increased efficiency and reliability of repeated hydroimpulsive bottomhole reservoir zone treatment and possibility of device usage in horizontal and inclined wells.
1 dwg
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