(19)
(11) EP 0 601 880 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.02.1995 Bulletin 1995/08

(43) Date of publication A2:
15.06.1994 Bulletin 1994/24

(21) Application number: 93309990.5

(22) Date of filing: 10.12.1993
(51) International Patent Classification (IPC)5E21B 43/1185
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 10.12.1992 US 988528

(71) Applicant: HALLIBURTON COMPANY
Duncan Oklahoma 73536 (US)

(72) Inventors:
  • Barker, James M.
    Katy, Texas 77450 (US)
  • Grigar, Larry Lee
    East Bernard, Texas 77435 (US)

(74) Representative: Wain, Christopher Paul et al
A.A. THORNTON & CO. Northumberland House 303-306 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)


(56) References cited: : 
   
       


    (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.







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