In this paper, a water-based green polymer mud is synthesized by simple compounding method. Effects of different kinds of tackifiers, their molecular weight on the viscosity of polymer mud and the effects of different fluid loss additives on mud fluid loss are studied. The results show that when polystyrene and anionic polyacrylamide with molecular weight of 8 ~ 10 million are used as the main thickening ingredient, polymer mud with high viscosity and high stability can be obtained. When the prepared polymer mud is formulated as NPAM: PEO: Hydroxypropyl cellulose(HPC) :Water = 42:10:10:100000 (unit: kg), the viscosity can reach 20.6 s, the filtration loss in 7.5 min is 24 mL, and the sand content is only 0.1%. Compared with traditional bentonite mud, the green environment-friendly polymer mud has the advantages of small amount of waste, low environmental pollution, and low pulping cost, and can meet the construction needs for most topography and geomorphology drilling engineering

Abstract
1. Introduction
2. Experiment
    2.1 Chemicals
    2.2 Preparation of green polymer mud
    2.3 Characterization
3. Results and Discussion
    3.1 The viscosity of different kinds of tackifiers
    3.2 The stability of different kinds of tackifiers
    3.3 The effect of PEO molecular weight on the viscosity of its aqueous solution
    3.4 Effect of NPAM molecular weight on the viscosity of its aqueous solution
    3.5 Modification of Polymer Slurry by Fluid Loss Reducer
    3.6 Performance of polymer mud products
    3.7 The mechanism of polymer mud protecting well wall
4. Conclusion
References

• Feng-Jun Zhang(Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University) Corresponding author
• Xian-Yang Sun(Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University)
• Xuan Li(Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University)
• Cui Kong(Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University)
• Jin Liu(Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University)
• Qian-Bao Chen(Anhui Engineering Material CO., LTD of CTCE Group)
• Won-Chun Oh(Department of Advanced Materials Science & Engineering, Hanseo University) Corresponding author