Rock bit with cavitating jet nozzles

Details Rock bit with cavitating jet nozzles Rock bit with cavitating jet nozzles

1978-11-17

1980-01-29

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175 67, 239589, E21B 908

Patent

active

041857062

ABSTRACT:
This invention teaches the use of cavitation inducing nozzles in combination with rock bits. The cavitation nozzles enhance the drilling rate by creating catastrophic implosion waves which erode solid material at the bottom of the hole while reducing the localized pressure at the rock tooth interface. Localized pressure reduction reduces the tendency for the cuttings to adhere to the bottom of the hole due to differential pressure.

REFERENCES:
patent: 2025261 (1935-12-01), Zublin
patent: 2175160 (1939-10-01), Zobel et al.
patent: 2875984 (1959-03-01), Goodwin
patent: 3207241 (1965-09-01), Neilson
patent: 3528704 (1970-09-01), Johnson
patent: 3713699 (1973-01-01), Johnson
patent: 3807632 (1974-04-01), Johnson

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