A HAMMERING AND ROTATABLE DRILLING DEVICE

Hammering and rotatable drill bit (1), which is meant for ground and rock drilling, said drilling device comprising a hollow shaft (2), said shaft having a hole (3) which is adjusted to direct flushing air onto the drilling surface to the front of the drill bit (1) and further from there towards the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SAMMATTI, JUSSI, AHONEN, JUKKA
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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