E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/11
E21B 7/18 (2006.01) E21B 4/02 (2006.01) E21B 10/04 (2006.01) E21B 10/60 (2006.01) E21B 19/24 (2006.01)
Patent
CA 1167023
ABSTRACT OF THE DISCLOSURE A device for producing boreholes in coal, such as for coal face impregnation or the like, has a boring head including several nozzles connected to a high-pressure hydraulic unit. In order to enable boreholes of suitable small diameters to be produced simply and without high plant cost, the boring head comprises a hydraulic motor which is driven by high- pressure water and which has a rotating portion connected to a head portion containing the nozzles. The rotating portion also has outlet ducts for the high-pressure water such that the high-pressure water exerts a torque on the rotating portion. Furthermore, the boring head has a device for guiding it in the borehole, together with thrust nozzles for maintaining the correct position of the boring head for the boring operation, and is connected to a high-pressure hose.
390783
Becker Helmut
Betting Klaus
Goretz Heinrich
Lingnau Horst
Rausch Manfred
Bergwerksverband G.m.b.h.
Fetherstonhaugh & Co.
Woma Apparatebau Wolfgang Maasberg & Co. G.m.b.h.
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