Changsha Tianhe Drilling Tools and Machinery Co.,Ltd., which is located in Hanpu Scientific and Educational Park, Changsha, Hunan, China, has become a specializing plant producing various drilling tools for soil and rock excavation projects. It is also a member unit of the council of China Drill Steel and Drilling Tool Association. It also has a long-term close technical cooperation with Changsha Mine Research Institute, Centre South University, Zhuzhou Cemented Carbide Group Co., Ltd. and some other research and production units. The quality management system has passed the certification of ISO 9001:2000. Technical TeamAt present, there are more than 120 people in the company. The technical team is composed of some technical personals devoting themselves to studying on the research and manufacture of drilling tools. Among them, eighteen people have the middle-class and high-class technical titles, covering majors of metal material, heat-treatment, powder metallurgy and machinery design. Besides, Li Zhaohe, who is drilling tools expert winning national technical allowance, is invited to be our technical consulter.Products SystemThere are four main series of products in our company: 1. Drilling tools with large diameters for deep hole and super deep hole drilling. 2.DTH hammers and their matched drilling bits under different working air pressure. 3. Concentric and eccentric reaming drilling tools followed by casing drilling. 4. Drilling tools and parts matched with rock drill under hydraulic pressure. Our DTH drilling tools have most of varieties and specifications in the same line. Among our various products, the deep hole DTH rock drill bit and the hammer with supper large diameter which are independently researched and exploited by our company, are international first-level products.