Wuhan Eastar Tool Co., Ltd. is a company who involved in R&D, manufacture and marketing of diamond bit for many years. The company operates flexibly and responses to market quickly, and it provides high quality products, timely delivery and perfect services. Company tenet: To supply excellent diamond bits and technical services for customers both at home and abroad, continuously construct and upgrade core competitive ability of the company and strive for opening up new business areas so as to promote economic and social benefit and realize steady and persistent development of the company. Product scope: The company can provide more than 18 sizes (from 3-1/2” to 17-1/2”) and over 90 types of PDC, TSP and natural diamond drilling bits, core bit and bit for special applications. The annual output is 4,000 pieces of bit. Technical predominance: The company has powerful technical strength and owns experienced experts and skilled operators that have involved in R&D, manufacture and marketing of diamond bit for many years. During the period from 1986 to 1997, the company had introduced advanced bit manufacturing technologies from abroad for three times. It innovates unceasingly while digesting the introduced technologies, and the company currently owns many advanced bit related technologies including CAD/CAM, CFD (Computational Fluid Dynamics) and logging data analysis & selection software, etc. Quality assurance: The company is licensed under ISO9001 and certified to API. Steady quality and excellent performance of the bits are assured by using sophisticated equipment such as 5-axis machining center, NC lathes, NC sintering furnace and integrated brazing-welding machine, etc. and strictly observing requirements of the quality system. Marketing operation and technical services: Through the company’s marketing system and, groups of experienced designing and marketing engineers are always available in oil fields to perform pertinent bit selection and design and sup