... is a professional production of petroleum machinery such as drill collars, drill pipe and sucker rod manufacturers. Sophisticated production equipment, ... as follows: the sucker rod No. 11B-0081, drill collar No. 7-1-0552, drill pipe, No. 5D-0104, tubing No. 5CT-0967. The company ... is now producing the products and production capacity: 1,Sucker rod 12 million m / year2,Drill ...