... sucker rod No. 11B-0081, drill collar No. 7-1-0552, drill pipe, No. 5D-0104, tubing No. ... company is now producing the products and production capacity: 1,Sucker rod 12 million m / year2,Drill Collar 10000pcs ... can provide sucker rods including grade C, K, D, KD, HL, HY and KH. Among them, grade C, ... manufactured according to the API Spec 11 B, grade KD, HL and HY according to SY/T5029-2006 standard ...