FIELD: oil and gas producing industry; designed for parting of pipe strings in emergency and their withdrawal from wells. SUBSTANCE: installed successively in device body along its axis are jet and high-explosive charges successively connected with initiating system. Charges are located with respect to each other so that distance 1 from axis of jet charge to middle of high-explosive charge relates to diameter d of explosive charge as 2.5 <1/d <3. EFFECT: higher efficiency of device operation. 1 dwg
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Authors
Dates
2002-11-10—Published
2001-01-03—Filed