Dongying Lianfeng Petroleum Machinery Co., Ltd. is located in Dongying Economic Development Zone, the hinterland of Shengli Oilfield, the second largest oil field in China. It is mainly engaged in the production and sales of oil drill pipe joints. The company covers an area of more than 30 mu, with modern office environment, advanced production equipment and a number of high-quality scientific research and technical personnel, senior management personnel. The company can produce all kinds of steel grade and various types of joints, with an annual production capacity of more than 100000 pairs. The company has passed the American API certification and ISO9001 quality management system certification, and established a set of mature market operation system. The products are supplied to Shengli Oilfield, Zhongyuan Oilfield, Changqing Oilfield, Daqing Oilfield and Karamay Oilfield.