Abstract: A new viewpoint of synergistic deslagging is offered on the basis of analyzing water-jet deslagging influencing factors of deslagging and sealing difficulty in high pressure water-jet slotting and hole reaming. The combined sealing structure of spiral auxiliary deslagging drill pipe was combined with O-ring and sealing pipe threads, and the compressive strength is 40 MPa. The industrial field tests show that the spiral auxiliary deslagging drill pipe can dredge deslagging passage and decreased coal cuttings size; the research results can meet the requirements of deslagging and sealing.