1.Oil drilling rig manufacturer since 2000 2.API 4F,7K & QHSE 3.Nominal drilling depth:1500m 4.60 units per ... 250HP to 1000HP. Tefico rig equipmentsinclude mast, substructure, crown block, rotary table, drawworks, travelling block, mud pump, hook, top drive etc. 3 ... are purchased by China big state-owned oilfield company. API-4F and API-7K has been authorized. 4. Technical Parameters of this drill ...