| 摘要 |
A drill rig assembly comprising a drill mast (3), a storage device (9) for storing a number of drill pipes (1) in a lying position near said drill mast, and a rotary head (5) mounted onto a rotary head trolley assembly (4) which is movable up and down along said drill mast (3). In order to enable a quick, easy and safe transfer of the drill pipes (1) from the storage device (9) to the rotary head (5), this rotary head itself is provided with a clamping assembly (15) arranged to hold a drill pipe with its extremity. The drill rig assembly further comprises means for moving the rotary head (5) with respect to said rotary head trolley assembly (4) to enable the rotary head to clamp with said clamping assembly (15) a drill pipe in the storage device (9) and to position the drill pipe on top of the drill string, substantially in axial alignment thereto. Since no separate drill pipe handling device is necessary, the system can be produced at a lower cost.
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