DEVICE FOR SEQUENTIAL INITIATION OF PERFORATION SYSTEM Russian patent published in 2023 - IPC E21B43/1185 

FIELD: oil industry.

SUBSTANCE: invention can be used to perform a set of perforating and blasting operations to cut off the previous interval and open several new clusters for the next stage of hydraulic fracturing in one trip. The device located in each section of the perforation system is made of electrically conductive parts: a unit for connecting an electric detonator, a diode unit placed in front of the electric detonators with alternating diode conductivity in each of the series-connected sections, a switch unit connected to the piston unit, and an electric wire, connecting the block of the electric detonator connection unit with the switch block, with the possibility, during the operation of the device, of formation by a movable contact in the switch block, permanently connected to the electric wire, of three electric circuits for passage of multipolar DC signals. The first electrical circuit, transit, is formed with the possibility of passing the first DC signal of a certain polarity through the devices of all sections of the system. The second electrical circuit, safety, is formed with the possibility of passing the first direct current signal of the same polarity to the diode connected with a conductivity that does not pass this signal to the electric detonator. The third electrical circuit, operating, is configured to pass the second direct current signal of opposite polarity to the diode, which passes the second signal to the electric detonator.

EFFECT: increase of reliability of the sequential perforation system. A device for sequential initiation of a perforation system is claimed, comprising a housing, inside of which there is an electric detonator with an electric wire connecting to a switch unit connected to a piston assembly.

11 cl, 4 dwg