perforating gun for perforating metal casing lining an oil and gas well; perforating gun subassembly, namely, a cylindrical housing having one or more openings therein with an explosive perforating charge disposed in each of the openings; perforating gun systems, namely, a combination assembly of a perforating gun, explosive charges, an addressable switch, and an electrical connector

'address':51 'assembl':43 'case':6 'charg':30,49 'combin':42 'connector':56 'cylindr':18 'dispos':31 'electr':55 'explos':28,48 'gas':11 'gun':2,14,38,47 'hous':19 'line':7 'metal':5 'name':16,40 'oil':9 'one':21 'open':24,36 'perfor':1,4,13,29,37,46 'subassembl':15 'switch':52 'system':39 'therein':25 'well':12

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