Drilling and mixing tool

摘要

The tool (1) has a central part (3) including a rotational axis, and foldable cutters (4-1, 4-2) arranged in the central part. The foldable cutters are movable between expanded and retracted positions along a vertical folding axis. A discharge nozzle (6) is arranged in the tool and supplied with a fluidic medium using a rotatably driven drilling rod. The foldable cutters are arranged along the central part in different planes and connected with the central part using a vertically oriented bolt (8).