a methodology and apparatus for cutting shape or profile through well tubular , or for completely circumferentially severing through multiple tubulars , including all tubing , pipe , casing , liners , cement , other material encountered in tubular annuli . this rigless apparatus utilizes a computer - controlled , downhole robotic three - axis rotary mill to effectively generate a shape or profile through , or to completely sever in a 360 degree horizontal plane wells with multiple , nested strings of tubulars whether the tubulars are concentrically aligned or eccentrically aligned . this is useful for well abandonment and decommissioning where complete severance is necessitated and explosives are prohibited , or in situations requiring a precise window or other shape to be cut through a single tubular or plurality of tubulars .