Patent ID: 9376880
Filing Date: 2016-06-28
CPC Classification: E21B

Claim Text:
1. Drilling device for producing a borehole in the ground with a drilling tool driven in a rotating manner for removing ground material and a container for receiving the removed ground material, wherein the container has a lower feed opening, through which the removed ground material can be introduced into the container, the drilling tool has at least one drill flight which is arranged below the container and has a plurality of removal tools, in an inlet area to the container between the drill flight and the feed opening an inlet section is provided, the pitch of which is increased with respect to a pitch of the drill flight, the drill flight is fixed on a container bottom which is linked in a pivotable manner to the container such that the drill flight is pivotable together with the container bottom, the drill flight is designed in a tapering manner in the drilling direction as a conical tapered auger, on an outer edge of the drill flight, the plurality of removal tools are arranged on a conical helix, the conical helix is extending from the outer diameter of the container bottom to a centering shaft, and the drill flight is designed to reach the outer diameter of the container at the inlet section.