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A customer operating in North Sea needed to remove 9 ⅝-in. 53.5-lb/ft (79.787-kg/m) casing down to 165 ft (50 m) below a well’s 13 ⅜-in. shoe. Initially the customer set out to remove the casing through conventional cut-and-pull methods. Multiple cuts in the casing were made with limited success in pulling the casing free due to barite settlement and cement between the casing strings.