1. a Postdoctoral Program of the Research Institute of Petroleum Exploration and Development , PetroChina, Beijing, China
2. b CNPC Drilling Research Institute , PetroChina, Beijing, Peoples Republic of China
3. c International Operation Department , Drilling Fluid Branch, GWDC , Beijing, China
4. d Computer Engineering College , Jingchu University of Technology , Jingmen, China
5. e School of Materials Science and Engineering , Tianjin University , Tianjin, China