Located on Chunjiao Street, Lvyuan District, Changchun city, Jilin Hengji Petrotech Company LTD. centers on developing new and advanced technology, covers science research, production and marketing with electromechanical appliances of oil extraction as leading products. Aimed at �Scientific innovation & Race to the top�, we set up a R&D team specialized in oil extraction, automatic control, mechanism and electronic computers, as well as a highly specialized marketing team. In 2008, we are certified by ISO (International Standardization Organization) 9001:2000. Jilin Hengji Petrotech Company LTD. developed its own pumping units: such as the chain-type oil pumping unit, the chain-type double-counterweight oil-pumping unit, the floor-type multi-chained oil-pumping unit (FOP), etc., which have gained a good fame among our customers by their proficient features: long stroke, low-frequency stroke, high power-saving rate (over 40%), meanwhile, our company has also been granted many patents and national fund supports. Our patented product, the energy-saving controller, with the advantage of non-sensor, automation, balance between oil supply and oil extraction, high efficiency in energy-saving (over 25%), has been widely used on the wells which are of low capacity in feed flow.