TongYi Petroleum Machinery Co., Ltd is a high-tech company with design, manufacture, installation and service of drilling tools, cementing tools. The company is bases in Dezhou, Shandong province with most facilities. TongYi is the major supplier for more than 10 onshore and offshore oilfields in China."TongYi services for all over the world". TongYi directs its management and manufacturing with internationally accepted practices, and enjoying a good reputation in wide region
