Preparation of organic polymer flocculant and its application in drilling fluid Ya Shi, Wenyu Ji, Xiwen Jia, Le Qu, Jie Zhang, Rui Zhou, Chen Gang and Yongfei Li E3S Web Conf., 329 (2021) 01008 Published online: 09 December 2021 DOI: 10.1051/e3sconf/202132901008