UNIVERSAL HEAD-DETONATOR OF BOREHOLE PERFORATOR (VERSIONS) Russian patent published in 2001 - IPC

FIELD: borehole perforators designed for casing perforation in well in recovery of hydrocarbons. SUBSTANCE: universal head-detonator includes body with window for transmission of pressure of fluid medium from well to body internal cavity. It also has explosive charge and striker for action on charge by striking. Connected with striker is releasing rod whose motion is accompanied by operation of striker and charge explosion. Connected with releasing rod is piston. Piston is movable due to variation of fluid medium pressure inside body. Releasing rod is selectively movable for acting on striker. Releasing rod is capable of mechanical uncoupling with piston and in selective motion, it ensures operation of striker. EFFECT: higher reliability of perforator detonation in well. 20 cl, 4 dwg