Qingdao Ruixin Petroleum Equipment Manufacturing Co., Ltd. (“Ruixin Petroleum”)is one separatedsubsideof Ruifeng group , founded in Oct of 2006, located in Qingdao of China,whereis close to harborand airport.Ruixin Petroleum is one Hightech company specified in downhole tools design and manufacturing, providing first class, professional petroleum equipments. Ruixin Petroleum is devoted in RD activities. In cooperation with major research institutes including China University of Petroleum and SINOPEC Research Institute of Petroleum Engineering, it has set up multiple well-equipped labs for sand control simulation, core flow fluid tests, cementing quality evaluation, screen evaluation, etc., and has obtained over 60 patents, based on which it built its key technologies including one-trip multi-zone gravel pack system (MZGP), horizontal well open hole gravel pack (OHGP) system, autonomous inflow control device (AICD) system, and MGC anti-plugging screens. Ruixin Petroleum occupies an area of 44,000m 2 , 15,000 m 2 of them is workshops with hig...