| 摘要 |
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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