Top Drive, Ibop, Drilling Equipemnt manufacturer / supplier in China, offering Electric AC Frequency Conversion Dq40b Load 250ton 50 kN. M 4000m Top-Drive-System for Vsp Series, Horizontal Ultra-Deepwater Hpht Casing-Drilling Rig for Dynamically-Positioned Arctic-Rated, Nov Varco Tesco Canrig Gearbox TDS11SA Gear for Top Drive and so on.