... Kazakhstan, Uzbekistan, Middle East and other countries in addition to be using in Shengli, Dagang, Liaohe oilfield and almost every big ... possible which can cut down energy costs by 10% to 40% comparing to other manual lift system. 4. Optimum Structure Design, ... safely. 5. High Reliability and Low Maintenance High reliability by using antifriction bearings, heavy duty belt, heavy load sleeve roller ...