BIT CONE WITH HARDFACED NOSE

A drill bit for drilling a wellbore, the drill bit having a cutter which has tungsten carbide inserts and a spear point. The spear point has a neck that joins a smooth portion of the cutter and blades that extend from the neck and converge to an apex. The blades define valleys or spaces between them...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	FELDERHOFF, FLOYD, C, MASSEY, ALAN, J, STANFIELD, GLEN, FREEMAN, MARK, A, GILMORE, KENNETH, E
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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