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US 9,567,806 B2Granted
Drilling bucket and method for drilling a bore hole
AssigneeBAUER Spezialtiefbau GmbH
InventorKarl van der Waal
Life of this patent
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Abstract
A drilling bucket for drilling a bore hole in the ground including a hollow cylindrical body and at least one cutting tool arranged at a lower side of the hollow cylindrical body for cutting soil material. The hollow cylindrical body has a lower opening for receiving soil material cut by the at least one cutting tool. For guiding the hollow cylindrical body in the bore hole an upper guiding device is provided which is arranged above the hollow cylindrical body and fixed to the hollow cylindrical body. The upper guiding device is configured to abut on a side wall of the bore hole.
Claims18
A drilling bucket for discontinuously drilling a bore hole in the ground comprising
- a hollow cylindrical body,
- at least one cutting tool arranged at a lower side of the hollow cylindrical body for cutting soil material, the hollow cylindrical body having a lower opening for receiving soil material cut by the at least one cutting tool, and
- an upper guiding device for guiding the hollow cylindrical body in the bore hole, the upper guiding device being arranged above the hollow cylindrical body and fixed to the hollow cylindrical body and being configured to abut on a side wall of the bore hole,
- a lower guiding device arranged around an outer circumference of the hollow cylindrical body for abutment against the side wall of the bore hole, and
- the upper and lower guiding devices each have a diameter which is larger than a diameter of the hollow cylindrical body,
- wherein the hollow cylindrical body for discontinuously drilling the bore hole in the ground is configured to be filled with soil material, lifted above the ground, evacuated and then again placed in the bore hole for further excavation of soil material,
- wherein at least one of the upper guiding device and the lower guiding device is ring-shaped, and
- wherein at least one of the upper guiding device and the lower guiding device comprises a continuous arcuate outer surface having a continuous diameter.
5 more elements
A discontinuous drilling machine comprising
- a mast,
- a drill rod,
- a rotary drive for rotationally driving the drill rod, a drilling bucket including
- a hollow cylindrical body,
- at least one cutting tool arranged at a lower side of the hollow cylindrical body for cutting soil material, the hollow cylindrical body having a lower opening for receiving soil material cut by the at least one cutting tool, and
- an upper guiding device for guiding the hollow cylindrical body in the bore hole, the upper guiding device being arranged above the hollow cylindrical body and fixed to the hollow cylindrical body and being configured to abut on a side wall of the bore hole,
- a lower guiding device arranged around an outer circumference of the hollow cylindrical body for abutment against the side wall of the bore hole, and
- the upper and lower guiding devices each have a diameter which is larger than a diameter of the hollow cylindrical body, said drilling bucket being connected to a lower end of the drill rod,
- wherein the hollow cylindrical body for the discontinuous drilling machine is configured to be filled with soil material, lifted above the ground, evacuated and then again placed in the bore hole for further excavation of soil material,
- wherein at least one of the upper guiding device and the lower guiding device is ring-shaped, and
- wherein at least one of the upper guiding device and the lower guiding device comprises a continuous arcuate outer surface having a continuous diameter.
8 more elements
A method for discontinuously drilling a bore hole in the ground, said method comprising the steps of
- rotating a drilling bucket having a hollow cylindrical body and at least one cutting tool arranged at a lower side of the hollow cylindrical body,
- filling the hollow cylindrical body with soil material cut by the at least one cutting tool,
- abutting an upper guiding device arranged above the hollow cylindrical body on a side wall of the bore hole and guiding the hollow cylindrical body within the bore hole during drilling of the bore hole, and
- arranging a lower guiding device around an outer circumference of the hollow cylindrical body, wherein the upper and lower guiding devices each have a diameter which is larger than a diameter of the hollow cylindrical body,
- wherein the hollow cylindrical body for discontinuously drilling the bore hole in the ground is filled with soil material, lifted above the ground, evacuated and then again placed in the bore hole for further excavation of soil material,
- wherein at least one of the upper guiding device and the lower guiding device is ring-shaped, and
- wherein at least one of the upper guiding device and the lower guiding device comprises a continuous arcuate outer surface having a continuous diameter.
4 more elements
Dependencies are inferred from the claim text.