US 11,952,838 B2
Device for clearing a helix gap of an auger, and method for making a drilled hole
Martin Lanzl, Ingolstadt (DE); Stefan Bachhuber, Waidhofen (DE); and Ralf Oehme, Ingolstadt (DE)
Assigned to BAUER Maschinen GmbH, Schrobenhausen (DE)
Appl. No. 18/040,119
Filed by BAUER Maschinen GmbH, Schrobenhausen (DE)
PCT Filed Jul. 27, 2021, PCT No. PCT/EP2021/071018
§ 371(c)(1), (2) Date Jan. 31, 2023,
PCT Pub. No. WO2022/028955, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 20189666 (EP), filed on Aug. 5, 2020.
Prior Publication US 2023/0265720 A1, Aug. 24, 2023
Int. Cl. E21B 12/06 (2006.01)
CPC E21B 12/06 (2013.01) 11 Claims
OG exemplary drawing
 
1. A device for clearing a helix gap of an auger, comprising
a retainer for holding the device on a mast of a drill,
a guide tube which surrounds the auger, with a drill helix, in portions and is mounted on the retainer, and
a clearing element which extends into the helix gap in a clearing position and is mounted on the retainer so as to be freely rotatable about a drilling axis, wherein
the guide tube is mounted on the retainer so as to be freely rotatable about the drilling axis,
the clearing element is firmly attached to the guide tube,
for clearing, the guide tube is axially fixed in the direction of the drilling axis, and
wherein, when in the clearing position, the clearing element, together with the guide tube, is configured to be caused to rotate about the drilling axis by pulling the auger along the drilling axis, for the purpose of clearing the auger, characterized in that the clearing element comprises a clearing plate having a receiving slit in which the drill helix is received in the clearing position.