Drilling tool and method for producing a bore in the ground

Abstract

The invention relates to a drilling tool, in particular for discontinuous earth drilling, with a ground removal means which is arranged in a lower region of the drilling tool and is designed for removing ground material, a receiving space which is designed for receiving the removed ground material above the ground removal means on the drilling tool, at least one passageway which is designed for the passage of the removed ground material from the ground removal means into the receiving space during drilling, a closure means for closing the at least one passageway during withdrawal of the drilling tool from the borehole and a connecting means located in the upper region of the drilling tool for releasable connection with a drill rod. In accordance with the invention provision is made in that a tubular central shaft is designed with a compensating channel which extends from at least one lower channel opening which is arranged below or on the closure means up to at least one upper channel opening which is arranged above the receiving space, wherein the compensating channel is designed for the flowthrough of a medium between the lower region and the upper region of the drilling tool during withdrawal and/or lowering of the drilling tool in the borehole.

Dependencies are inferred from the claim text.