Based in Dongying, where Shengli Oilfield , China âs second largest oilfield, is located, Kerui is a professional andinternational industrial group committed to petroleum equipment,EPC turnkey projects and oilfield service. Based on over-50-yearlarge-oilfield development experience accumulated in ShengliOilfield, Kerui has unique advantages in terms of technology,talent, R&D and other aspects.