Ground processing tool and a method for creating a borehole in the ground

Patent metadata

Field	Value
Publication number	US-10458184-B2
Application number	US-201815885425-A
Country	US
Kind code	B2
Filing date	Jan 31, 2018
Priority date	Feb 13, 2017
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

The invention relates to a ground processing tool and a method for creating a borehole in the ground, wherein ground material is removed by the ground processing tool and blended with a fluid in the created borehole to form a suspension, which is suctioned away via at least one opening in the at least one mixing blade and via the conducting channel in the central shaft.

First claim

The invention claimed is:

1. A ground processing tool having a central shaft including a conducting channel built therein, the ground processing tool having at least one mixing blade attached to the central shaft and extending radially outward,
wherein
the at least one mixing blade comprises an inner cavity,
the inner cavity communicates with the conducting channel in the central shaft,
an outside of the mixing blade comprises at least one opening to the inner cavity,
a removal apparatus is arranged on a lower side of the ground processing tool and is configured for removing ground material,
a ring shaped circumferential wall is mounted on the central shaft and encircles a mixing area in which the at least one mixing blade is arranged, and
a conveyor configured to convey the removed ground material is arranged between the removal apparatus and the at least one mixing blade.

2. The ground processing tool according to claim 1 ,
wherein
the circumferential wall includes an upper deck area that includes a hood-like mixing bell formed therein.

3. The ground processing tool according to claim 1
wherein
the ring shaped circumferential wall is configured to be rotatable with respect to the central shaft.

4. The ground processing tool according to claim 1 ,
further comprising
multiple mixing blades arranged on the central shaft.

5. The ground processing tool according to claim 1 ,
wherein
at least one mixing element is attached to an inner side of the ring shaped circumferential wall.

6. The ground processing tool according to claim 1 ,
further comprising
a connecting apparatus for a joint connection with a suction apparatus provided in an upper area of the central shaft.

7. The ground processing tool according to claim 1 ,
further comprising
strut-shaped mixing elements arranged at the ring shaped circumferential wall.

8. A drilling device for earth and rock drilling,
comprising
the ground processing tool according to claim 1 .

9. The drilling device according to claim 8 ,
further comprising
a suction pump configured to suction away ground material through the conducting channel in the central shaft via the at least one opening in the mixing blade.

10. A method for creating a borehole in the ground using a ground processing tool according to claim 1 , the method comprising:
removing ground material with the ground processing tool;
blending the removed ground material with a fluid in the created borehole to form a suspension, and
suctioning the suspension away via the at least one opening in the at least one mixing blade and via the conducting channel in the central shaft.

11. The method according to claim 10 ,
further comprising:
discharging the suspension from the borehole.

Assignees

• Bauer Maschinen Gmbh

Inventors

• Finkenzeller Stefan Michael
• Klippenstein Juergen
• Schweiger Manfred
• Bauer Thomas

Classifications

• E21B10/60

  characterised by conduits or nozzles for drilling fluids (for roller bits E21B10/18; for percussion drill bits E21B10/38) · CPC title

• E21B7/00

  Special methods or apparatus for drilling · CPC title

• E21B10/61

  characterised by the nozzle structure · CPC title

• E21B10/44 Primary

  Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts (E21B10/42 takes precedence) · CPC title

• E21B21/00

  Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (freeing objects stuck in boreholes by flushing E21B31/03) · CPC title