Changsha Drilling Machinery Co., Ltd. (CTHC) Located in historic city Changsha It is a professional manufacturer of drilling equipment diamond bits and diamond reaming, CTHC has the team of professional technicians as well as advanced production craftwork and excellent service system. Meanwhile, CTHC has established technical cooperation relations with Central South University and China University of Geo-sciences Changsha Drilling Machinery Co., Ltd is a collection of scientific research, processing and sales business. The company main products are diamond bit, diamond reaming, PDC drill bits, drilling tools, drilling materials, drilling rigs, and other accessories. Annual production capacity could reach 400 million RMB. Our products are widely applied to the geology, water, electricity, metallurgy, mining, coal, railway, roads, buildings and building materials. We received high praise for our high product quality and liable services CTHC have been an excellent manufacturer in drilling field. All those achievements are based on care and support from its sincere cooperators, thanks for customer with giving us the best motivation to move forward. Meanwhile, we will pay more attention to product quality, operation management and technology creation to make more and better products Holding the philosophy of high quality products and excellent service, CTHC has been adhering to the belief of customer foremost and quality first as well. From products design to after sales service, CTHC always tries its best to solve problems for customers to make them mostly satisfied and profited. Your kindly suggestion will be much appreciated!</p>