Boring or penetrating the earth – Boring with explosion in inaccessible hole – With bore condition firing control – or compensating means
Patent
1995-07-12
1996-09-03
Novosad, Stephen J.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
With bore condition firing control, or compensating means
175 456, 175 46, E21B 43117, E21B 431185
Patent
active
055515207
ABSTRACT:
The invention is an apparatus for initiating a wellbore perforator comprising a first firing head for generating a first explosive signal when a first actuation signal is applied to the first firing head, a second firing head for generating a second explosive signal when a second actuation signal is applied to the second firing head, a first means for transferring the first explosive signal to shaped charges in the perforator including a first bulkhead interposed between the shaped charges and the first means for preventing transfer of low order initiation of the first means to the shaped charges, and a second means for transferring the second explosive signal to the shaped charges including a second bulkhead interposed between the shaped charges and the second means for preventing transfer of low order initiation of the second means to the shaped charges.
REFERENCES:
patent: 4650009 (1987-03-01), McClure et al.
patent: 4836109 (1989-06-01), Wesson et al.
patent: 4901802 (1990-02-01), George et al.
patent: 5103912 (1992-04-01), Flint
patent: 5287924 (1994-02-01), Burleson et al.
patent: 5355957 (1994-10-01), Burleson et al.
Bethel Robert K.
Ellis James
Grayson Michael B.
Fagin Richard A.
Novosad Stephen J.
Western Atlas International Inc.
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