... producing the products and production capacity: 1,Sucker rod 12 million m / year2,Drill Collar 10000pcs/year3,Drill pipe ... Liande 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 ... big-pump capacity oil-well. And grade K, KD and KH sucker rod are made from fine Cr ...