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Hejianshi Tengda Petroleum Supplies Co.,Ltd located in the PetroChina in Huabei. Our company is a business entity specializing in development,production,distribution,and after sales service of drilling equipments. It is a company with manufacturing,design,research and development of PDC drilling bit for almost all codes of Tricone rock bit.In addition,we produce drilling rig,mud pump ,Diamond Drill and other accessories. The company established in 1980,there are 10 workshop with 100 workers.Then under the leadership of the CEO Jinku Zhang,so much,in fact,that the ground now is broken for 100,000-square-foot addition,bringing total square footage of office space,machine shop,warehouse and storage facilities to more than 500,000 square-feet.What started out as one-man company now has grow into a worldwide organizatin that has sode bits all over the world. Our company have reliable quality and competitive prices.We are certified by API and ISO.Whatever drilling tools you need,we can supply them,also we can produce them according to your special orders. Tengda products not only won the trust of domestic users,but also are exported Southeast Asia,Russia,America and Africa. If you are interested, we will be happy to send you any further information.Don't hesitate to cintact us and welcome to visit our factory. We are looking forward to adding you as our Cooperation partner.