Top Drive, Ibop, Drilling Equipemnt manufacturer / supplier in China, offering TDS Dq50bq-Vsp (350t) Heavy Duty Top Drive for Max 5000m Land Driling Rig and Workover Rig, Advanced Dq50b-Vsp (350ton) Top Drive System (TDS) for 5000m Land Driling Rig and Workover Rig, Advanced TDS Dq40b-Vsp (300TON) Top Drive Variable Frequency Drive for 4000m Land Driling Rig and Workover Rig and so on.