DEVICE FOR INITIATION OF DETONATION IN PERFORATORS LOWERED INTO WELL ON TUBINGS Russian patent published in 2000 - IPC

FIELD: oil and gas industry; applicable in perforation operations in development wells drilled for oil and gas. SUBSTANCE: device has perforated head accommodating detonating device and percussive mechanism made in form of pipe tightly closed from atop and bottom with covers. Said pipe accommodates unit of series-connected electric battery. Perforator head is closed from atop with cover having cable lead-in. Cover is covered from atop with layer of dielectric accommodating nongrounded contact plate, and grounded contact plate is located above dielectric. Located on lower cover of percussive mechanism is system of striking pins with their points directed down, including central striking pin whose end has contact bit insulated from cover, and striking pins located over circumference on periphery of lower cover. Battery unit, covers and pipe of percussive mechanism, striking pins, contact plates, cable lead-in and head cover form circuit of electric detonator. EFFECT: higher operate reliability of device due to preservation of pressure differential on formation in course of perforation, and simplified design of percussive mechanism. 1 dwg