The pre-existence of Tianhe Oil Group Co., Ltd is Mudanjiang Petroleum Machinery Co., Ltd, established in 1973. Tianhe Petroleum Machinery Joint-Stock Co., Ltd has restructured twice during the developing of the years. It has been organized as a Joint-stock company according to the Corporation Law in 2006.    Our Tianhe main products are: Drill Collars, Spiral Drill Collars, Integral Heavy Weight Drill Pipe, and several kinds of drilling tools, work-over tools, cementing tools, coring tools, fishing tools and fitting, Hydraulic Bucking Unit, Hydraulic Jar Tester, Hydraulic Down hole Motor Tester, BOP automatic cleaning systems and other equipments which includes more than 120 types of products and more than 1000 Specifications.    Our company has been the class 1 network supplier and member of council of CNPC, industrial association member of council of CNPC and SINOPEC, assigned suppliers of CNOOC. We have obtained the use right of API monogram and certification of ISO9001:2000.Our products have been exported to USA, Canada, The European Union, The Commonwealth of Independent States, India, The Middle East, North Africa, etc.    Adhering to principle of development science and technology, our company has established good cooperation relationships with many oil field drilling design institutes, famous oil universities home and abroad, which speed up products development. That makes the development of new products speed up. The new products always gain the patents. The Hydraulic Bucking Unit and Hydraulic Jar Tester have got national certification for new focus products.