Method for the chisel-less formation of boreholes for deep bores and chisel-less drilling system for carrying out said method

Abstract

The invention relates to a method for the chisel-less formation of boreholes for deep bores by means of high-pressure water jet cutting. A chisel-free drilling method that makes substantially continuous drilling operation possible is characterized, according to the invention, by a combination of the processes of high-pressure water jet cutting and high-frequency rock fragmentation. The invention also relates to a chisel-free drilling system for carrying out the method.

1 . A method for the chisel-less formation of boreholes for deep bores by means of high pressure water jet cutting, characterized by a combination of the high pressure water jet cutting process with high frequency rock fragmentation. 
     
     
         2 . The method as claimed in  claim 1 , characterized in that the high frequency rock fragmentation is used alternating with the high pressure water jet cutting or simultaneously with the high pressure water jet cutting. 
     
     
         3 . The method as claimed in  claim 1 , characterized in that the pressures of the high pressure water jet cutting process and the frequencies of the high frequency rock fragmentation are variably adjustable. 
     
     
         4 . The method as claimed in  claim 1 , characterized in that the wall of the borehole is continuously lined with a reinforcement. 
     
     
         5 . A chisel-less drilling system for carrying out the method as claimed in  claim 1  with a drill head provided with water outlet nozzles, characterized in that sonotrodes for transmitting high frequency vibrations are arranged in addition to the water outlet nozzles for the high pressure water jet cutting on the front end side of the drill head. 
     
     
         6 . The chisel-less drilling system as claimed in  claim 5 , characterized in that the drill head, but at least an end plate of the drill head, which end plate is provided with the water outlet nozzles and the sonotrodes, is designed to be rotatable about the center axis. 
     
     
         7 . The chisel-less drilling system as claimed in  claim 5 , characterized in that at least one safety module and at least one borehole lining module are arranged behind the drill head in the drilling direction. 
     
     
         8 . The chisel-less drilling system as claimed in  claim 7 , characterized in that the safety module has at least one locking element for the form-fitting closing of the inside diameter of the borehole, and clamping elements for the force-fitting securing of the drilling system in the borehole. 
     
     
         9 . The chisel-less drilling system as claimed in  claim 7 , characterized in that the borehole lining module has spray nozzles for applying a curing medium, and a reinforcing fabric laying apparatus. 
     
     
         10 . The chisel-less drilling system as claimed in  claim 5 , characterized in that the drill head, the safety module and the borehole lining module are connected to supply devices outside the borehole via flexible pipe and/or hose lines, wherein the pipe and/or hose lines serve for the supply and removal of the materials relating to the drilling system and for the feeding in of the electric supply lines. 
     
     
         11 . The chisel-less drilling system as claimed in  claim 5 , characterized in that the drive and also the steering and control apparatus for the drill head are arranged on the drill head. 
     
     
         12 . The chisel-less drilling system as claimed in  claim 5 , characterized in that the pumps for the high pressure water jet cutting and for sucking off the flushing medium are arranged on the drill head and/or on the safety module. 
     
     
         13 . The chisel-less drilling system as claimed in  claim 5 , characterized in that the drill head and/or the safety module and/or the borehole lining module are connected to a workplace outside the borehole via data lines, for example a bus system. 
     
     
         14 . The chisel-less drilling system as claimed in  claim 13 , characterized in that, via the data lines, in addition to the system parameters, such as, for example, feed speed and pumping pressure, all of the ambient parameters in the borehole, such as, for example, temperature, pressure, rock density and the like, can be determined via sensors coupled to the data lines and can be transmitted to the workplace in order to control the drilling system. 
     
     
         15 . The chisel-less drilling system as claimed in  claim 5 , characterized in that, in order to generate the high frequency pulses for the high frequency rock fragmentation, piezo elements which are each coupled to an amplifying unit consisting of a sonotrode and an amplitude transformer are arranged in the drill head.