... produces the petroleum machinery such as sucker rod, drill collar, drill pipe and oil tube, etc. It has over ... API Certificate : sucker rod 11B-0081, drill collar 7-1-0552 , drill pipe 5D-0104,oil tube 5CT-0967. ... 000 meters/year2,drilling collar 10,000 pieces/year3,drill pipe 20,000 tons/year4. oil pipe 40 ... ,000 tons/year5. drill pipe tool joint 100,000 set/year API 5DP drill pipe for gas and oil ...