DQ70 Top Drive 450Ton Rated Load Top‑Drive for Deep Well Drilling & Workover Operations Description: DQ70 Top Drive is a heavy‑duty AC VFD top‑drive system with 450Ton rated load, specially engineered for deep‑well drilling and workover operations on land rigs. Manufactured complying with relevant API standards, it delivers powerful torque output, wide speed adjustment range and stable performance for 7000‑meter‑class well operations. Powered by dual main motors, this top