A saturated saltwater drilling fluid based on salt-responsive polyampholytes

JIANG Guancheng,HE Yinbo,CUI Wuge,YANG Lili,YE Chenxi

Fig. 3. Influences of NaCl content on viscosity of HvL (a), LvH (b), AM-AMPS anionic copolymer (c) and AM-AMPS-DMDAAC polyampholyte solutions.