Ammunition and explosives – Blasting – Detonation wave modifying
Reexamination Certificate
2004-10-08
2008-10-07
Bergin, James S (Department: 3641)
Ammunition and explosives
Blasting
Detonation wave modifying
C102S313000, C102S321000, C089S001150, C175S004600, C175S004550
Reexamination Certificate
active
07430965
ABSTRACT:
A perforating apparatus (100) includes a plurality of shaped charges (102) each having an initiation end and a discharge end. A detonating cord (116) is operably coupled to the initiation ends of the shaped charges (102). A carrier (106) contains the shaped charges (102). The carrier (106) includes at least one discharge location corresponding to the discharge ends of the shaped charges (102) when the perforating apparatus (100) is in its operable position. The discharge location has first and second material layers (122, 124) wherein the second material layer (124) exhibits resilient recovery such that an opening created by a jet formed from detonating one of the shaped charges (102) in the second material layer (124) is smaller than an opening created by the jet in the first material layer (122), thereby retaining debris in the perforating apparatus (100) with the second material layer (124).
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Bergin James S
Halliburton Energy Service,s Inc.
Youst Lawrence R.
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