Drilling device and method for producing a bore

Abstract

A boring apparatus for producing a bore within a support tube in the ground. The boring apparatus comprises a housing which is introducible into the support tube and is non-rotatably fixable to the support tube, a cutting device for removing ground material, a rotary drive for driving the cutting device in rotation and a feeding device, by way of which a flushing fluid can be fed into a region of the cutting device. Arranged above the cutting device is a receptacle, into which removed ground material is deliverable by way of the flushing fluid. Provided in the receptacle is at least one stirring element for mixing the removed ground material with the flushing fluid. The removed ground material is upwardly dischargeable out of the receptacle together with the flushing fluid by means of a discharging device. The invention also relates to a method for producing a bore in the ground.

1 - 11 . (canceled) 
     
     
         12 . Drilling device for producing a bore inside a support tube in the ground with
 a housing which can be inserted into the support tube and fixed in a torque-proof manner on the support tube,   a cutting means for removing ground material,   a rotary drive for driving the cutting means in a rotating manner,   a feed means for feeding flushing liquid,   a receiving container which is arranged above the cutting means and into which removed ground material can be conveyed, and   a discharge means, with which the removed ground material can be discharged together with the flushing liquid in the upward direction from the receiving container, wherein in that   the receiving container comprises a stirring chamber, in which at least one stirring element driven in a rotating manner is provided for stirring the removed ground material with the flushing liquid,   between the cutting means and the at least one stirring element a conveying means is arranged, and   in that through the feed means the flushing liquid can be fed into an area of the cutting means.   
     
     
         13 . Drilling device according to  claim 12 ,
 wherein in that   a clamping means is provided, with which the housing can be clamped in the support tube.   
     
     
         14 . Drilling device according to  claim 12 ,
 wherein in that   the conveying means arranged between the cutting means and the at least one stirring element is designed as a conveyor screw.   
     
     
         15 . Drilling device according to  claim 12 ,
 wherein in that   the cutting means and the at least one stirring element can be jointly driven by the rotary drive.   
     
     
         16 . Drilling device according to  claim 12 ,
 wherein in that   an upper drill part is provided which can be braced in the support tube and   in that a lower drill part is provided which is movable with respect to the upper drill part and comprises the cutting means and the receiving container.   
     
     
         17 . Drilling device according to  claim 16 ,
 wherein in that   a positioning cylinder is provided, with which the lower drill part is movable with respect to the upper drill part.   
     
     
         18 . Drilling device according to  claim 12 ,
 wherein in that   the feed means and/or the discharge means has a telescopic line.   
     
     
         19 . Drilling device according to  claim 12 ,
 wherein in that   in addition to the at least one driven stirring element at least one stationary mixing element which interacts with the stirring element is arranged in the receiving container.   
     
     
         20 . Drilling rig with a support tube which can be introduced into the ground and a drilling device according to  claim 12  which can be arranged in the support tube. 
     
     
         21 . Method for producing a bore in the ground, in particular by means of a drilling device according to claim  1  and/or a drilling rig according to  claim 20 , in which
 a support tube is introduced into the ground, 
 a drilling device is inserted into the support tube and fixed in a torque-proof manner on the support tube, 
 ground material is removed by means of a rotationally driven cutting means of the drilling device, 
 a flushing liquid is fed, 
 removed ground material is conveyed into a receiving container of the drilling device above the cutting means, and 
 the removed ground material is discharged together with the flushing liquid in the upward direction from the receiving container, 
 wherein in that 
 in a stirring chamber of the receiving container the removed ground material is stirred with flushing liquid by means of at least one stirring element driven in a rotating manner, 
 the flushing liquid is fed into an area of the cutting means and 
 in that the removed ground material and the flushing liquid are conveyed into the stirring chamber of the receiving container.