DEVICE FOR EXCITED DETONATION IN WALL CUMULATIVE PERFORATORS Russian patent published in 2019 - IPC E21B43/1185 

FIELD: blasting operations.

SUBSTANCE: device for excitation of detonation in borehole cumulative perforators relates to perforating-blasting equipment, and can be used for initiation of explosive chain of structural cumulative perforators lowered to oil and gas wells on tubing string. Device for excitation of detonation in borehole cumulative perforators is lowered into the well on tubing via an adapter connected to the housing and to the shock mechanism with hydraulically isolated detonation device. Housing is made in the form of two parts – upper and lower housings. Upper housing has circulation holes, covered with percussion mechanism consisting of piston and connected to it by means of rod thread, rod is equipped with a spring ring installed in the central hole of the hammer rod fixed from the pin movement, a bushing connected to the stock by means of a set of shear pins securing the impact mechanism from movement. Protective piston of percussion mechanism from action of foreign objects stop disc with ventilation holes is located in upper casing.

EFFECT: provides for information value in terms of fixation of successful operation of the device, and influence of inner diameter of tubing string is excluded with due allowance for various in-pipe deposits, intentions, contaminants, availability of sludge for reliability of activation of the assembly of perforation system.

1 cl, 3 dwg