ROLLER CONE DRILL BIT HAVING LUBRICATION CONTAMINATION DETECTOR AND LUBRICATION POSITIVE PRESSURE MAINTENANCE SYSTEM

摘要

A roller cone drill bit is disclosed which includes at least one roller co ne rotatably mounted to a bit body. The bit body includes therein a lubricant reservoir adapted to supply lubricant to bearings on which the roller cone rotates abo ut the bit body. The bit includes a sensor adapted to detect drilling fluid contaminati on of the lubricant. The bit includes a processor/transmitter operatively coupled to t he sensor and adapted to communicate signals corresponding to detected contamination.< /SDOAB>