Centrifugal water-air separation in earth drilling bits

Details Centrifugal water-air separation in earth drilling bits Centrifugal water-air separation in earth drilling bits

E - Fixed Constructions

21

B

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E21B 10/00 (2006.01) B01D 45/16 (2006.01) E21B 10/24 (2006.01) E21B 21/00 (2006.01)

Patent

CA 1101837

Abstract of the Disclosure A rock bit used for drilling with air as the circulating fluid, and a centrifugal separator to filter liquid and other contaminants from the air diverted to the bit bearings. The filter generates a fluid vortex with radial vanes, each having plural pitches, located within the shank of the bit. Bearing coolant passages, located beneath the separator, receive filtered air from a central, filtered air location. The vortex centrifugally forces the water and other contaminants outwardly into nozzle passages that direct fluid toward the bottom of the borehole. -2-

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