Repulsing clays on drill bits

Details Repulsing clays on drill bits Repulsing clays on drill bits

1975-03-27

1977-03-15

Novosad, Stephen J.

Boring or penetrating the earth

Processes

166 65M, 166301, 175 68, 175320, E21B 700, E21B 1700

Patent

active

RE0291510

ABSTRACT:
Bit balling is prevented by impressing a negative electrical charge on the drill bit by the use of bi-metallic electromotive potential differences, batteries or other electrical energy sources.

REFERENCES:
patent: 1804078 (1931-05-01), Baden
patent: 2032624 (1936-03-01), Lyons
patent: 2283206 (1942-05-01), Hayward
patent: 2372575 (1945-03-01), Hayward
patent: 2466239 (1949-04-01), Holcombe
patent: 3137355 (1964-06-01), Schumacher, Jr.
patent: 3251427 (1966-05-01), Ewing
patent: 3294184 (1966-12-01), O'Brien
patent: 3294186 (1966-12-01), Buell
patent: 3311181 (1967-03-01), Fowler
patent: 3346060 (1967-10-01), Beyer
patent: 3734181 (1973-05-01), Shaffer

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