FIELD: oil and gas extracting industry.
SUBSTANCE: device has pressure pipe and several perforators, connected in series and having body, flow nozzles and nozzle holders. Axis of nozzle of each perforator is directed upwards towards well mouth in such a way that it forms an angle of 45° with axis of pressure pipe. Perforator bodies are located in such a way that planes passing through axis of flow nozzle, perforator body and axis of pressure pipe of each perforator starting from down to upwards towards well mouth, form with analogical plane of lower perforator an angle, which is calculated on basis of mathematical expression. Body of each perforator is placed at distance of about 5mm from the wall of casing column due to eccentric placement of perforator along pressure pipe. Distance between perforators along pressure pipe is determined on basis of thickness of perforated bed.
EFFECT: higher perforation effectiveness due to increased height and depth of cutting plane.
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