Pressure wave generating device for petroleum drilling

The utility model discloses a pressure wave generating device for petroleum drilling. Drill collar, wherein the control motor, the speed reducer, the rotating shaft, the stator and the rotor are arranged in the drill collar, a plurality of annular grooves are evenly formed in the outer surface of the drill collar, a wear-resisting belt is sleeved with each annular groove, the thickness of each wear-resisting belt is larger than the depth of the corresponding annular groove, and a wear-resisting sleeve is arranged on the inner surface of the drill collar and is in threaded connection with the inner surface of the drill collar. The wear-resistant drill collar has the advantages that the wear-resistant belt is additionally arranged on the outer surface of the drill collar, so that the wear resistance outside the drill collar is effectively improved; besides, the wear-resistant sleeve is additionally arranged on the inner surface of the drill collar, so that the strength and hardness of the drill collar are impro