... machinery such as sucker rod, drill collar, drill pipe and oil tube, etc. It has over 300 professional employees including more ... -0081, drill collar 7-1-0552 , drill pipe 5D-0104,oil tube 5CT-0967. Our products and producing ability as follows ... . oil pipe 40,000 tons/year5. drill pipe tool joint 100,000 set/year API 5DP drill pipe for gas and oil field