One-piece drill bit with improved gage design

Details One-piece drill bit with improved gage design One-piece drill bit with improved gage design

1989-09-20

1990-07-17

Neuder, William P.

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

175410, E21B 1046

Patent

active

049415387

ABSTRACT:
A one-piece drill bit is shown for use in drilling a borehole in an earthen formation. The bit includes a body having a face on one end and a shank on the opposite end. The face has a noise and a gage region. The gage region is bisected between an upper and lower stabilizing regions of full gage diameter cutter elements. An intermediate undercut region minimizes contact with the borehole wall while maintaining an effective gage length for the bit.

REFERENCES:
patent: 4140189 (1979-02-01), Garner
patent: 4246977 (1981-01-01), Allen
patent: 4545441 (1985-10-01), Williamson
patent: 4640375 (1987-02-01), Barr et al.
patent: 4696354 (1987-09-01), King et al.

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