Integral drive key sleeve type drill stem of rotary drilling rig

The utility model relates to engineering machinery, and relates to part structures of a rotary drilling rig, in particular to an integral drive key sleeve type drill stem of the rotary drilling rig, which includes a sectional rod and a sectional rod pipe in sleeve joint, wherein a plurality of longitudinal key slots matched with key strips on an inner layer sectional rod are formed on the inner wall of the pipe body of the sectional rod pipe. The utility model has reasonable structure, particularly the key slots in an integral drive key sleeve can be processed mechanically; and the transmitted torque is large and the drill stem can stand wear and tear, therefore, the service life of the drive key sleeve can be prolonged, and the defects of the welding type drive key sleeve, such as multiple weld joints and susceptibility to deformation and damage can be overcome. The drill stem has the advantages of convenient processing, deformation prevention during machining process, and high mechanical strength.