Institution: | 1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, P R of China; 2. Drilling Engineering Technology Institute, Zhongyuan Petroleum Exploration Bureau, Puyang, Henan 457001, P R of China; 3. Cementing Engineering Department of Zhongyuan Petroleum Exploration Bureau, Qingfeng, Henan 457331, P R of China |