ROOF DRILL BIT AND CUTTING INSERT THEREFOR

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

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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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Beschreibung
Zusammenfassung: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 axial forward end thereof. The hard insert includes a plurality of leading cutting edges for cutting the earth strata. The at least one helical twisted surface and the feeder ledge enhance the flow of debris into the dust port.