we are Shengli Oilfield Freet Petroleum Equipment co., Ltd, Located in Dongying City, Shandong, owned 11 branches & subsidiary companies, a leading and reliable OCTG & oilfield equipments manufacturer in China, Mainly producing API Tubing, Casing, ERW Pipe, Sucker rod, Pumping unit, Workover rig, also including Gost Casing,etc. Annual OCTG capacity is around 400,000 tons. The main clients include Royal Shell, Repsol-YPF, PDO, PDVSA, CNPC, SINOPEC and so on. As you know we have long and abundant experience in this filed, producing full range of API and Gost products with high quality, setting up sales network around worldwide and getting good and well-know reputation there.