Abstract: Some oil reservoir with high paraffin and heavey oil in the south of Jizhong region has entered into high water cut period. Oil well rods, pipes, and pumps has been eroded and scaled seriously. To ensure normal well production, fluoronates surfactant is utilized with its oleophobic and hydrophobic characteristics to the combined operation of water-soluble drag reducer with antiscale and corrosion inhibitor. So the basic formula of FYR-C02 suitable for well paraffin removal and viscosity reduction, corrosion and scale inhitition is obtained. According to the actual condition of different wells in the field, the components of the basic formula are adjusted and applied to more than 60 wells. Good results has been achieved and it could be technical reference to combined operation of paraffin removal and viscosity reduction with corrosion and scale inhitition.