Drill bit with gage definition region

Details Drill bit with gage definition region Drill bit with gage definition region

1997-04-02

2000-09-26

Dang, Hoang

Boring or penetrating the earth

Bit or bit element

Bit with leading portion forming smaller diameter initial bore

175406, 175408, E21B 1046

Patent

active

061231606

ABSTRACT:
A drill bit and method of drilling employing a gage definition region on the bit to relatively gradually and incrementally increase the diameter of the borehole being drilled from a diameter that is cut by fixed face cutters or rolling cone cutters on the bit body to a larger diameter. Preferably, the diameter of the gage definition region defined by cutting structures thereon varies along a longitudinal length of the bit, being smallest nearest the leading end of the bit. In a preferred embodiment, the gage definition region includes a plurality of helically arranged cutting elements disposed around the perimeter of the gage definition region. Such a configuration of cutting elements helps to reduce the loading on, and wear of, each individual cutting element. Thus the effective life of the bit is extended by enhancing its ability to drill the borehole to the gage diameter over a longer interval than may be achieved with conventional bit designs.

REFERENCES:
patent: 1084871 (1914-01-01), Tuck
patent: 1547459 (1925-07-01), Stafford et al.
patent: 1701427 (1929-02-01), Shields
patent: 1907154 (1933-02-01), Mitchell
patent: 2738167 (1956-03-01), Williams, Jr.
patent: 2838286 (1958-06-01), Austin
patent: 3135341 (1964-06-01), Ritter
patent: 3220497 (1965-11-01), Mori
patent: 3367430 (1968-02-01), Rowley
patent: 3825083 (1974-07-01), Flarity et al.
patent: 3945447 (1976-03-01), Peterson
patent: 4031974 (1977-06-01), Peterson
patent: 4091884 (1978-05-01), Thomas
patent: 4098363 (1978-07-01), Rhode et al.
patent: 4234048 (1980-11-01), Rowley
patent: 4351401 (1982-09-01), Fielder
patent: 4352400 (1982-10-01), Grappendorf et al.
patent: 4512426 (1985-04-01), Bidegaray
patent: 4515226 (1985-05-01), Mengel et al.
patent: 4515227 (1985-05-01), Cerkovnik
patent: 4550790 (1985-11-01), Link
patent: 4552231 (1985-11-01), Pay et al.
patent: 4586574 (1986-05-01), Grappendorf
patent: 4635738 (1987-01-01), Schillinger et al.
patent: 4848489 (1989-07-01), Deane
patent: 4848491 (1989-07-01), Burridge et al.
patent: 4869330 (1989-09-01), Tibbitts
patent: 4981183 (1991-01-01), Tibbitts
patent: 4986375 (1991-01-01), Maher
patent: 5004057 (1991-04-01), Tibbitts et al.
patent: 5163524 (1992-11-01), Newton, Jr. et al.
patent: 5178222 (1993-01-01), Jones et al.
patent: 5314033 (1994-05-01), Tibbitts
patent: 5341888 (1994-08-01), Deschutter
patent: 5361859 (1994-11-01), Tibbitts
patent: 5425288 (1995-06-01), Evans
patent: 5456328 (1995-10-01), Saxman
patent: 5467836 (1995-11-01), Grimes et al.
patent: 5495899 (1996-03-01), Pastusek et al.
patent: 5641027 (1997-06-01), Foster
patent: 5678644 (1997-10-01), Fielder
patent: 5697461 (1997-12-01), Newton et al.
Description of Norton Christensen drill bits--early 1980t3 s (5 pages).

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