Founded in 2001,located in Qingzhou,a beautiful city,Shandong Changqing Peroleum Hydraulic Machinery Co.,ltd.,with the pace of petroleum industry repidly rising up and Qingzhou machinery industry flourishing,has capacity of annual products,150 well drilling pumps and 30000 hydraulic pumps,by introducing advanced technology,facilities and qualified technicians,and now has become one of the main domestic enterprises which make machineries and accessories used in petroleum,mines,metallurgy and engineering. 200