Drill head with nozzles

Details Drill head with nozzles Drill head with nozzles

E - Fixed Constructions

21

B

E21B 7/18 (2006.01) E21B 7/06 (2006.01) E21B 10/60 (2006.01)

Patent

CA 2064010

2064010 9119074 PCTABS00008 A drill head (1) as part of a drill lance for an apparatus for drilling an underground tunnel, which drill head has a channel (10) extending along the center axis of the drill lance and is rotatable about the center axis, comprising at least one forwardly directed nozzle (2), the nozzle channel (21) of which communicates with the channel (10) and exits outside the center axis, the drill head (1) being characterized by at least one rearwardly directed nozzle (4) being provided, the nozzle channel (41) of which communicates with the channel (10).

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