Horizontal wet drilling tool uses vibration device for periodic impact of drill rod or drill head in longitudinal direction during horizontal displacement

摘要

The wet drilling tool has a rotary drill rod (34) provided with a drill head having exit openings for a drilling suspension, with controlled displacement of the drill head. A spring-mounted vibration device (28) acts on the drill rod and/or the drill head, for periodic impact of the drill rod and/or the drill head in the longitudinal direction of the drill rod during the horizontal displacement.. An Independent claim for a horizontal drilling method is also included.