METHOD TO GENERATE JET STREAM AND SHAPED CHARGE OF PERFORATOR FOR ITS REALISATION Russian patent published in 2013 - IPC F42B1/28 E21B43/117 F42B1/32 F42B3/08 

FIELD: blasting.

SUBSTANCE: method and device relate to perforation of well casing pipes for production of well, gas, water, and may be used in jet perforators that improve hydrodynamic connection of a bed and a well, and providing for increased well yield. A shaped charge comprises a body, inside of which there is an explosive cartridge. The cartridge gas a charge hollow coated with lining. Inside the lining there is an insert fixed with a layer of plastic material. The density of the plastic material layer is 0.8-2.4 g/cm³. The product of density by thickness of the plastic material layer is less than the thickness of the wall insert. The ratio of insert top thickness to the diameter of the lining base is from 0.1 to 0.3. The ratio of insert height to lining height is from 0.5 to 0.8. The explosive cartridge is exploded. Detonation products press the shaped lining, then the plastic material is pressed and heated. The impact wave energy is reduced. The speed of shaped lining pressing is reduced. The impact wave from collision of the insert and the lining is sent from the zone of collision along the lining material. Large amount of the lining and insert participates in generation of the jet stream. The jet stream is shaped.

EFFECT: original design of lining and increased efficiency of explosive energy takeoff by lining elements.

8 cl, 3 dwg, 4 tbl