FIELD: oil and gas production industry. SUBSTANCE: it is used in secondary opening of oil and gas wells and ensures higher inflow of oil and gas. According to method, lowered into well is perforator with chamber, passage forming tool and hydraulic pump. Chamber is made with low-pressure space, hydraulic oil tank, and control valve. Located in low-pressure space is piston-rod pair which creates high-pressure space. Passage forming tool is mounted on working piston. Pressure is initially created in low-pressure space and then is transferred to under-piston space of piston-rod pair. Advance of tool is performed due to displacement of working piston under pressure in high-pressure space. Tool is returned under action of spring and liquid pressure in well. Passage forming tool of piercing type is mounted on working piston. EFFECT: high efficiency. 2 cl, 1 dwg
