Organization
(1. School of Mechatronic En-gineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; 2. China Petroleum Technology andDevelopment Corporation, CNPC, Dongcheng, Beijing 100009, China; 3. China Oilfield Services Company Ltd.,CNOOC, Tanggu, Tianjin 300450, China)Journal of Southwest Petroleum University, Vol. 33, No. 2, 161 – 164,2011(1674 – 5086,in Chinese)