... 1.Oil drilling rig manufacturer since 2000 2.API 4F,7K & QHSE 3.Nominal drilling depth ... substructure, crown block, rotary table, drawworks, travelling block, mud pump, hook, top drive etc. 3. Why choose Tefico? ... by China big state-owned oilfield company. API-4F and API-7K has been authorized. 4. Technical Parameters ... (L×W×H)Power and Qty. of mud pump800hp×2Height of drilling floor 4.5mNominal open ...