Hydraulic type Six tungsten carbide blades Good working performance and reliability Mill 30-meter-long casing in a single run It ... through and sidetracking operation in oil and gas wells.StructureThe hydraulic casing section mills are consisted of an upper sub, a ... /2" casing, 6-5/8" casing, 7" casing, 9-5/8" casing, etc.More information about this tool, please contact us. hydraulic casing section mill ...