CUMULATIVE PERFORATOR Russian patent published in 2022 - IPC E21B43/117 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to perforating and blasting operations in oil and gas wells. The cumulative perforator contains a supporting structure, on/in which shaped charges are installed, the directions of which are oriented relative to each other, and initiation means. At least one shaped charge is installed in such a way that the direction of one of the neighboring charges is rotated relative to its direction by an angle in the range of 150-210°, and the direction of the other neighboring charge is rotated relative to its direction by an angle in the range of 90-170°.

EFFECT: reduction of the destructive effect on the perforator and on the well, elimination of resonant phenomena when the charges in the perforator are triggered, prevention or localization of the formation of defects in the cement ring of the well and in the rock resulting from the operation of the perforator, formation of reliable bridges between the cement ring of the well and in the rock perforated channels.

5 cl, 11 dwg