Drill bit

Details Drill bit Drill bit

1976-11-03

1978-03-21

Vlachos, Leonidas

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

Including tool with duct

175340, 239600, 285404, B23B 5106

Patent

active

040800911

ABSTRACT:
A rotary drill bit having a plurality of journal-mounted rotating cutters and jet passageways through which drilling fluid is discharged between the cutters is provided with removable nozzles for air or other drilling fluid. The nozzles are provided with a peripheral groove and secured in place in said passageways by the divided ends of a bifurcated retaining pin.

REFERENCES:
patent: 3329222 (1967-07-01), Neilson
patent: 3447755 (1969-06-01), Cartwright
patent: 3521911 (1970-07-01), Hanes et al.
patent: 3685601 (1972-08-01), Hollingshead

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