Extended nozzle and bit stabilizer and method of producing

Details Extended nozzle and bit stabilizer and method of producing Extended nozzle and bit stabilizer and method of producing

1976-11-17

1978-01-17

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175325, 175408, E21B 910

Patent

active

040687317

ABSTRACT:
A rotary drill bit with downwardly extended circulation nozzle means an outwardly facing portion of which serves as a bit stabilizer wherein the upper portion of the nozzle means is on a greater diameter than the lower portion thereof so that the lower portion is inset from the wall of the formation, the upper portion of the nozzle means being machined from a given larger diameter to a diameter approximately but preferably slightly less than that of the bit body, and providing in the machine surface hardened inserts such as tungsten carbide.

REFERENCES:
patent: 3207241 (1965-09-01), Neilson
patent: 3628616 (1971-12-01), Neilson
patent: 3645346 (1972-02-01), Miller

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