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(11) | EP 0 601 880 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Perforating gun detonator package incorporating exploding foil |
(57) A perforating gun assembly incorporates an elongate body (20,30) which supports a
capacitive discharge firing unit (25) having the form of an elongate cylinder terminating
at the lower end with a feedthrough. The feedthrough, protected by a resilient boot
(37), connects with a very short coaxial cable (40) stored in a chamber (32). At the
bottom of the chamber (32), the coaxial cable connects with a detonator head (55)
of an elongate cylindrical structure. It encloses and protectively houses the end
of a detonating cord (52). On the interior, it supports an electric pulse initiated
flying disk detonator mechanism. The structure is constructed to suppress inductance
in the firing circuit from the capacitive firing unit so that appropriate firing pulse
rise time and current magnitude can be achieved. |