PDWF-1 is made from oil soluble chemicals and surfactant through a special refining process.

PFF-III can inhibit shale hydration expansion, prevent the collapse of unstable formation, improve the quality of mud cake, and improve the lubricating and sealing capability

PFF-II is compounded by natural asphalt and composite surfactant.

PFF-I is a proven drilling fluid additive which has many advantages and can be widely applied.