ROOF DRILL BIT AND CUTTING INSERT THEREFOR

A roof drill bit has an elongate roof drill bit body having a forward end and a rearward end. The bit body includes at least one helical twisted surface terminating at a dust port and a feeder ledge proximate the at least one helical twisted surface. A hard insert is affixed to the bit body at the a...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	Swope, Chad A
Format:	Patent
Sprache:	eng
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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