CUMULATIVE CHARGE Russian patent published in 2015 - IPC E21B43/117 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas production. Perforator for use in well containing cumulative charge; the cumulative charge shell; the cumulative charge explosive located inside the shell; lining of the cumulative charge adherent to the explosive and made with possibility of the cumulative jet creation upon explosive detonation to make the perforated channel; at that component of the energetic material of the lining is intended for its exothermal reaction inside the perforated channel after the explosive detonation; and gas creating component of the lining is intended for reaction upon presence of the exothermal reaction of the energentic material component to create gas, thus creating pressure wave that moves back via the channel to clean the channel of debris.

EFFECT: assurance of the cumulative perforating jet used both for perforated channel creation in the formation rock, and to clean the perforated channel of fragments.

17 cl, 7 dwg