ZHONGTAI is an advanced technology company dedicated to the R&D, manufacture and trade of different types Kelly bar , various drilling tools, spare parts for rotary drilling rig. ZHONGTAI has domestic first-class scientific researchers and talents for the rotary drilling and geological analysis .Constantly optimizing the design , selection of new materials and new manufacturing concepts and processes , creats the most wear-resistant , not-open welding , high-pressure-resistant , high torque friction and interlocking Kelly bar ZHONGTAI has been committed to its motto in production and service: "quality supreme, customers first, excellence pursuance" while it explores constantly to excel and to perfect its management. ZHONGTAI highly focuses on international cooperation and communication. Till present, our products have been exported to many different countries and regions such as Germany, Singapore, Turkey, Russia, Middle East and South America