The product is based on our company's traditional products, the introduction of foreign advanced technology, the use of proprietary technology production structure research and development into high-performance, high-quality products.Suitable for drilling in all kinds of complex and hard formations. The size of this product is 14'', it's the main product of our company.By using the unique mixture formula and interface structure design, the anti-impact performance of the product is greatly improved compared with similar products in the industry.It is mainly used in the manufacture of oil cone bit, but also in the field of down-hole bit, composite bit and so on