| 摘要 |
The invention concerns a drill rig combination comprising partially a carrier (2) with pivot mounted manoeuvrable arm system (3, 12), partially a bottom hole assembly (15) supported by the arm system comprising a means of driving for alternating application of a drill bit mounted in the assembly and a means of indexing the drill bit, whereby, while forming a drill string, the assembly is connected to the distal end of a drill support in the from of a flexible jointless drill tube. In order to achieve a drill rig combination with improved positioning of the bottom hole assembly drill bit in given course in the rock, the following distinctive features are proposed: that the manoeuvrable arm system comprises a boom (3), which at its bottom end is pivot mounted on the carrier and that means of driving are arranged for slewing the boom relative to the carrier, a feed beam (12) that is pivot mounted to the front end can be slidden lengthwise relative to the boom, that the bottom hole assembly drill bit (16) is swivel mounted for turning around an axis extending in the direction of drilling and axially limited in movement in a housing in the bottom hole assembly, that a driving means is arranged for indexing the drill bit around its axis of rotation while drilling is in progress, whereby the indexing means is synchronised to the percussion unit in the assembly so that indexing or rotation is done while the drill bit is in a position withdrawn into the bottom hole assembly or in a position away from the rock face. |
