DEVICE FOR SUCCESSIVE INITIATION OF PERFORATING SYSTEM Russian patent published in 2018 - IPC E21B43/1185 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, specifically to the structural part of perforating systems that are lowered into oil or gas wells on a geophysical cable and initiated by electric detonators, and can be used for perforating disparate intervals during a single trip. Device comprises a device body, an electric detonator, a detonating cord, an electric wire, a detonation transfer device, and a piston. Piston is located in a casing made in the form of a cylinder with a stepped through hole, has a sealing and initiating part and is fixed in the body from movement by a lock washer. Piston is insulated from the body by a sleeve-insulator and an insulating washer. In the mechanical chain of switching contacts the electronic contact switching unit made in the form of an electronic key, triggered by a change in the state of the sensor, is additionally included.

EFFECT: enabling triggering of only one of several perforating electric detonators from feeding one pulse from the explosive device in a strict sequence from the bottom up.

4 cl, 4 dwg