Back reaming tool

A back reaming tool 10A which comprises a tool body 12A adapted to be coupled to a drill string and a single roller cone 20 rotatably mounted to a journal pin 35 fixed to the tool body. The roller cone is held in place in the event of a bearing failure by a cone lock 10B.

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Bibliographische Detailangaben
Hauptverfasser:	PETER THOMAS CARIVEAU, VINCENT WAYNE SHOTTON, ROBERT HARLAN SLAUGHTER JR
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 back reaming tool 10A which comprises a tool body 12A adapted to be coupled to a drill string and a single roller cone 20 rotatably mounted to a journal pin 35 fixed to the tool body. The roller cone is held in place in the event of a bearing failure by a cone lock 10B.