FIELD: oil and gas producing industry, particularly, devices for treatment and completion of wells in the course of their construction and operation. SUBSTANCE: device consists of pulse generator in the form of check valve conjugated with movable seat, circulation check valve and mechanical-hydraulic packer. Each of them has hydraulic delay relay made in the form of valve and discharging choke. Sizes of discharging chokes of delay hydraulic relays are selected for provision of delayed return of circulation valve to initial position with respect to that of check valve of pulse generator and packer. EFFECT: higher reliability and productivity, extended field of application, simplified well treatment technology. 5 dwg, 1 ex
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