Baoji huitong Oilfield Machinery Co.,ltd is the largest machinery manufacturer under the China National Petroleum Corporation (CNPC). It can design and manufacture all kinds of oilfield drilling and production equipment including complete sets of rigs. Wellhead equipment, solids control systems, special-purpose vehicles as well as tools and accessories. It holds 7 API licenses including 55 kinds of products. These products are used all over the oilfields in China and many countries in the world