Earth-boring tools having features for affecting cuttings flow

Details Earth-boring tools having features for affecting cuttings flow Earth-boring tools having features for affecting cuttings flow

2011-04-05

2011-04-05

Neuder, William P (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S393000

Reexamination Certificate

active

07918292

ABSTRACT:
An earth-boring bit has a bit body having a plurality of bit legs extending longitudinally therefrom, each bit leg comprising one or more groove regions formed along a laterally outer surface thereof. Each groove region comprises a fluid course for drilling fluid and cuttings to pass across the outer surface. A ridge may be disposed adjacent a lower edge of one or more of the groove regions. Each groove region may also be positioned at differing heights on the bit legs. Methods of forming earth-boring bits are also disclosed.

REFERENCES:
patent: 4091884 (1978-05-01), Thomas
patent: 5547033 (1996-08-01), Campos, Jr.
patent: 5553681 (1996-09-01), Huffstutler et al.
patent: 6450270 (2002-09-01), Saxton
patent: 7182162 (2007-02-01), Beuershausen et al.
patent: 2010/0089656 (2010-04-01), Ho et al.
International Search Report for International Application No. PCT/US2009/049680 mailed Feb. 18, 2010, 3 pages.
Written Opinion for International Application No. PCT/US2009/049680 mailed Feb. 18, 2010, 5 pages.

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