FIELD: oil producing industry, particularly, secondary stimulation of formation by vacuum. SUBSTANCE: device has hollow body accommodating depression chamber and packer. Installed telescopically on body and locked by shear screw is cover connected with rope and having retainer. Rod of varying cross-section is installed for engagement with body overflowing hole. Located on cover cylindrical surface is packer and wedge. Wedge external conical surface is engageable with slips which are connected to body guide for radial motion. Axial motion of packer relative to cover is limited from one side by wedge, and from the other side by cover retainer. Cover also has limiter installed for engagement with body boss, and stop installed for engagement with wedge. Receiving holes are located below body guide. Design of claimed device has low specific amount of metal and is simple in manufacture. It allows to save time for servicing and preparation for operation, installation in any well interval and performance of several round trip operations for a shift. EFFECT: considerable increase of efficiency of formation stimulation, and reduced material expenses. 1 dwg
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