FIELD: oil and gas extracting industry. SUBSTANCE: device has double cylindrical body with apertures and a sliding valve with ring-shaped spring fixing means. Device also includes a lock with pyrocartridges and spring-loaded differential piston. Piston interacts with spring-loaded sliding-valve and signal receiver for activating pyrocartridges. Body apertures are overlapped with sliding valve. Sliding valve is moveable by means of tubing spring for opening said apertures and fixing sliding valve in upper position with differential piston. Sliding valve can be moved for closing apertures by activating a pyrocartridge. EFFECT: decreased time needed for starting device operation. 2 dwg
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