The top drive system is a power device placed on the top of the drilling tool in oil drilling instead of the turntable to directly drive the drilling tool to rotate for drilling construction. Its power is generally a hydraulic motor or an electric motor. Electric top drives are available in the form of DC, AC, and AC frequency conversion. It can effectively reduce and prevent the occurrence of downhole complex situations. When a slight collapse occurs, back reaming can be performed; during tripping, the drill string can be continuously rotated and mud can be circulated if necessary.
Top drive models for which spare parts are available:
DQ40/2250DB
DQ50/3150DB
DQ70/4500DB
HDQ70/4500DB
DQ90/6750DB
DQ120BSC
DQ90BSD
DQ90BSC
DQ70BSD
DQ70BSC
DQ70BSE
DQ50BC
DQ40BCQ