Boring bit

Details Boring bit Boring bit

1990-05-18

1991-12-17

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175424, E21B 1018, E21B 1060

Patent

active

050727966

ABSTRACT:
A boring bit for drilling is provided comprising one set of rotatable toothed wheels secured thereon as well as one set of tubular nozzles and one central nozzle for injecting drilling fluid from a chamber in bit body toward the bottom of a borehole. The boring bit comprises the inlet end of said tubular nozzle being secured on the bit body and connected with said chamber while its outlet end is quite close during operation to the lowest point of toothed wheels and the bottom of a borehole, and the fluid passage of said tubular nozzle from the inlet end to the outlet end is straight and cylindrical. Branch fluid passages are provided on the main fluid passage of said central nozzle for washing and cooling toothed wheels.

REFERENCES:
patent: 2293259 (1942-08-01), Johnson
patent: 2710741 (1955-06-01), Hall, Sr.
patent: 3363706 (1968-01-01), Feenstra
patent: 3393756 (1968-07-01), Mori
patent: 3419220 (1968-12-01), Goodwin et al.
patent: 3509952 (1970-05-01), Galle
patent: 4077482 (1978-03-01), Ioannesian et al.
patent: 4106577 (1978-08-01), Summers
patent: 4687067 (1987-08-01), Smith et al.
patent: 4759415 (1988-07-01), Pessier

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