Crossflow rotary cone rock bit with extended nozzles

Details Crossflow rotary cone rock bit with extended nozzles Crossflow rotary cone rock bit with extended nozzles

E - Fixed Constructions

21

B

255/73

E21B 10/18 (2006.01)

Patent

CA 1323025

CROSSFLOW ROTARY CONE ROCK BIT WITH EXTENDED NOZZLES ABSTRACT OF THE DISCLOSURE A three cone rock bit is disclosed having at least a pair of mini-extended nozzles extending from a dome portion of the bit. Two 120° leg segments contain extended noz- zles, a third 120° segment is nozzleless. The mini- extended nozzles convert hydraulic pressure to kinetic fluid flow energy with a minimum of flow disturbance, thereby delivering a concentrated flow of fluid against the floor of the formation and across the cutting face of the bit, sweeping detritus past the nozzleless 120° leg segment and up the borehole. A centerjet mini-extended nozzle may additionally be positioned in the rock bit dome to further enhance borehole penetration.

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