Fixed cutter drill bit for abrasive applications

A cutting tool includes a tool body having a longitudinal axis and a cutting face, a plurality of blades spaced azimuthally about the cutting face and extending at least laterally through a gage region, and a plurality of cutters disposed along the blades. At least two different types of back reamin...

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Bibliographische Detailangaben
Hauptverfasser:	OLIVER STUART R, ISNOR SIDNEY J, OLDHAM THOMAS W, HOFFMASTER CARL, AZAR MICHAEL G, ALSUP SHELTON W
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 cutting tool includes a tool body having a longitudinal axis and a cutting face, a plurality of blades spaced azimuthally about the cutting face and extending at least laterally through a gage region, and a plurality of cutters disposed along the blades. At least two different types of back reaming elements may be disposed on a transitional surface between the gage region of at least one blade and a connection end of the cutting tool. Alternatively, at least one back reaming element may be disposed on a transitional surface between the gage region of at least one blade and a connection end of the cutting tool, and a wear resistant material provided on or in the transitional surface.