Air circulation ports in rotary rock bit journal bearing

A thrust bearing system for a roller cone rock bit includes at least one roller cone disposed on a leg having an air channel therethrough, the thrust bearing system including a primary thrust bearing surface on the leg configured to contact a corresponding primary bearing surface on the roller cone,...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SHOTTON, VINCENT W, MARCUS, JEREMY, NAGARAJ, MAHAVIR, BHOITE, SAAMER
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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