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A saturated saltwater drilling fluid based on salt-responsive polyampholytes
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JIANG Guancheng,HE Yinbo,CUI Wuge,YANG Lili,YE Chenxi
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Table 3 Basic performance of SSDF prepared with AM-AMPS anionic copolymer.
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| Condition | Apparent
viscosity/(mPa·s) | Plastic viscosity/
(mPa·s) | Yield point/Pa | Dynamic plastic ratio/
(Pa·(mPa·s)-1) | Φ6/Φ3 | API fluid loss/mL | Fluid loss under high temperature and pressure/mL | Before hot-aging
After hot-aging | 86.5
49.0 | 70
47 | 16.86
2.04 | 0.241
0.043 | 7/5
2/1 | 3.9 | | | 53.3 |
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