Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.  

DSP-1 Copolymer Filtration Reducer Drillingfluid, DSP-2 Copolymer Filtration Reducer Drillingfluid, Sulfomethylated Phenolic Resin Drilling Fluid, Modified Drilling Starch Drilling Chemical, Nano-Polyester Shale Inhibitor Drilling Fluid, Polyamine Shale Inhibitor Drilling Fluid, Aluminum Based Shale Inhibitor Drilling Fluid, Ep Lubricant Drilling Fluid Additive, Soild Lubricant Graphite Drilling Fluid Additive, Defoamer Drilling Fluid Chemical Additive