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A high salt tolerance and low adsorption drag reducer based on non-covalent enhancement
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MA Yingxian,ZHU Zhi,GUO Jianchun,ZHOU Han,LI Jia,XIONG Yujia,MA Leyao
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Table 2 Friction reduction ratios of DN drag reducer at different mass fractions and salinities.
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Salinity/
(mg·L-1) | Mass
fraction/% | Friction reduction ratio/% | | NaCl water | CaCl2 water | | 0 | 0.10 | 76.24 | 76.24 | | 25 000 | 0.10 | 72.76 | 72.42 | | 50 000 | 0.10 | 71.07 | 71.36 | | 100 000 | 0.10 | 69.73 | 70.68 | | 100 000 | 0.15 | 76.10 | 75.42 | | 150 000 | 0.15 | 69.56 | 70.12 | | 200 000 | 0.15 | 70.78 | 70.39 | | 250 000 | 0.20 | 70.12 | 70.24 | | 300 000① | 0.20 | 71.24 | 70.96 | | 300 000② | 0.20 | 74.83 | 75.21 |
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