MICROTUNNELLING SYSTEM AND APPARATUS

A microtunnelling apparatus and system that includes an external drive system having rotational and linear thrust drive means, a drill head section (20) having drill rotor (21) and drill rod (22) and connecting to intermediate drill rods (41) allowing extension of the boring hole created by the dril...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SALINS, ANDIS, HARRISON, STUART
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS SHAFTS TUNNELS
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