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we own a full range of drilling tools production lines, including deep-hole drilling and boring machine, ordinary lathe, the intermediate frequency heat treatment production lines, spiral milling machine tools, CNC pipe threading lathes, the imprint of milling machines and so on. In our company a special testing center has been established, equipped with advanced delicate testing equipments and means from home and abroad ,which control the whole process of manufacturing, strictly implement the standard of SY/T5144-1997 ?SY/T5146-1997 ?SY/T5051-1991 ?SY/T6509-2000 ensuring the performance indices of our company can meet the standard of SY/T5144-1997 China National Standard and API of American Petroleum Association. We strive for survival on the basis of quality with ISO9001 and API. With the annual output of 6000, the main products of our company are drill collars, spiral drill collars, No-magnetic drill collars, integral heavy weight drill pipes, stabilizers, No-magnetic stabilizers,square drill pipes (Kellys)and so on we can also make other types according to different demands.