A terpolymer,which was used in drilling fluids with dynamic filtration reducers to generate a non-invasion drilling fluid,was synthesized using C12DMAAC/Acrylamide/Sodium acrylate.

• 以钻井液封堵理论为基础,制备了具有超低渗滤功能的十二烷基二甲基烯丙基氯化铵/丙烯酰胺/丙烯酸钠三元共聚物,将其添加到含不同动态降滤失剂的钻井液中可形成无侵害钻井液。