CUMULATIVE SECTIONAL PERFORATOR FOR WELL Russian patent published in 2013 - IPC E21B43/117 

FIELD: oil and gas industry.

SUBSTANCE: perforator comprises a row of sections connected to each other. Each section comprises a frame, where shaped charges are placed, being joined with detonating cords, a unit of explosion initiation, units of detonation reception-transmission, placed in joints of adjacent sections, every of which is formed by elastic bushings coupled at the ends and placed on each end of the section, each having two adjacent parallel through channels. One of these channels is axial, and the other one is peripheral. Explosive cartridges are tightly placed in these channels - accordingly, axial and peripheral boosters, which interact with each other by the side surface. Interaction between axial boosters of adjacent sections is provided at their ends. At the same time each of free ends of axial and peripheral boosters at the side of shaped charges of each section interact with ends of detonating cords placed with a part into the axial and peripheral channels of the tightened elastic bushing.

EFFECT: increased reliability of actuation of a cumulative sectional perforator in the specified mode, increased safety of works.

13 cl, 3 dwg