Rotary drill bits

Details Rotary drill bits Rotary drill bits

1991-10-31

1992-11-17

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

With bit guide or bore wall compacting device

175426, E21B 1046

Patent

active

051635240

ABSTRACT:
A rotary drill bit comprises a bit body carrying a plurality of preform cutting elements, and a plurality of circumferentially spaced gauge pads which, in use, engage the surrounding formation. Some of the gauge pads carry cutting elements and others are free of cutting elements. To reduce cost, each gauge pad which is free of cutting elements has an outer bearing surface which is more abrasion resistant than the outer surfaces of the gauge pads which carry cutting elements.

REFERENCES:
patent: 5042596 (1991-08-01), Brett et al.
patent: 5111895 (1992-05-01), Griffin

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