top drive
top drive · top drives
A mechanical device on a drilling rig that provides clockwise torque to the drill…A mechanical device on a drilling rig that provides clockwise torque to the drill string to drill a borehole.
Meaning
1 sensesA mechanical device on a drilling rig that provides clockwise torque to the drill string to drill a borehole.
Dictionary text adapted from Wiktionary (Wiktionary contributors, CC BY-SA 4.0) and Open English WordNet / Princeton WordNet (CC BY 4.0, WordNet License); shared under CC BY-SA 4.0. Example sentences and recordings are credited where they appear.