Rock bit combination to enhance cuttings removal

Details Rock bit combination to enhance cuttings removal Rock bit combination to enhance cuttings removal

1978-12-01

1980-02-12

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175 65, 175422, E21B 908, E21C 706

Patent

active

041879210

ABSTRACT:
This invention teaches the use of one or more cavitation inducing nozzles in combination with conventional nozzles for rock bits. The cavitation nozzles enhance the drilling rate by rapidly removing cuttings from the hole bottom. Cavitation from a cavitating nozzle positioned on one side of the bit reduces the pressure thereby inducing drilling mud at higher pressure passing through an opposing non-cavitative nozzle to move across the rock-tooth interface. The resultant cross-flow rapidly removes the cuttings from the hole bottom.

REFERENCES:
patent: 3231030 (1966-01-01), Blom
patent: 3315755 (1967-04-01), Brooks
patent: 3402075 (1968-09-01), Goldwasser et al.
patent: 3528704 (1970-09-01), Johnson, Jr.
patent: 3603410 (1971-09-01), Angona
patent: 4068731 (1978-01-01), Garner et al.
patent: 4071097 (1978-01-01), Fulop et al.

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