BEARING AND LUBRICATION SYSTEM FOR EARTH BORING BIT

BEARING AND LUBRICATION SYSTEM FOR EARTH BORING BIT

Methods and apparatus for maintaining lubrication of rolling cone cutters mounted on journal pins. Embodiments comprise a rotating cone disposed on a journal pin and forming a journal gap there between. A cylindrical journal sleeve is disposed in the journal gap. The journal sleeve has a longitudina...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RICHMAN, LANCE T, CATHORNE, CHRIS E, SLAUGHTER, ROBERT H, NORRIS, KIRK A
Format: Patent
Sprache:eng ; fre
Schlagworte:
BEARINGS
BLASTING
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
ELEMENTS OR CRANKSHAFT MECHANISMS
ENGINEERING ELEMENTS AND UNITS
FIXED CONSTRUCTIONS
FLEXIBLE SHAFTS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
LUBRICATING
MECHANICAL ENGINEERING
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
ROTARY BODIES OTHER THAN GEARING ELEMENTS
SHAFTS
THERMAL INSULATION IN GENERAL
WEAPONS
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Beschreibung
Zusammenfassung:Methods and apparatus for maintaining lubrication of rolling cone cutters mounted on journal pins. Embodiments comprise a rotating cone disposed on a journal pin and forming a journal gap there between. A cylindrical journal sleeve is disposed in the journal gap. The journal sleeve has a longitudinal gap forming opposing end portions, which a re continuously contoured. A lubrication port is disposed in the journal pin and in fluid communication with a lubrication supply. The lubrication port has an outlet located in a recess i n the journal gap. Each end of the recess comprises a transitioning surface extending between t he bottom of the recess and the outer surface of the journal pin to prevent sharp transitions . In certain embodiments, the journal pin may comprise two or more lubrication ports, eac h located in a recess with transitioning surfaces.