Rock bit with improved extended nozzle

Details Rock bit with improved extended nozzle Rock bit with improved extended nozzle

E - Fixed Constructions

21

B

255/73

E21B 10/60 (2006.01) E21B 10/18 (2006.01)

Patent

CA 1258064

ABSTRACT OF THE DISCLOSURE An earth boring bit with an improved extended jet nozzle constructed with a tube having only one curved entrance near the head of the bit and a straight region adjacent the exit of the nozzle, with the curved region being smoothly convergent without substantial disruption or deflective surfaces from a maximum cross sectional area adjacent the head to a minimum cross sectional area in the straight region. The velocity of the fluid flowing through the tube increases gradually from a minimum adjacent the head to a maximum at the exit, with the ratio of minimum to maximum being substantially three to one.

519958

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