Drilling assembly

摘要

The assembly has a drive unit movably arranged in a drilling ramp, where the drive unit has a rod retainer (28) for detachably connecting the drive unit with a drilling rod. A hydraulic motor stands in connection with the rod retainer in a torque transmitting manner, and a casing retainer (32) is arranged co-axial to the rod retainer for detachably connecting the drive unit with a casing. A bayonet coupling with a tappet (46) and stop elements (74) is provided between the motor and the casing retainer for torque transmitting connection of the motor and the casing retainer.