Boring or penetrating the earth – Bit or bit element – Noncutting portion forwardly of cutting portion
Patent
1997-09-08
1999-12-28
Bagnell, David
Boring or penetrating the earth
Bit or bit element
Noncutting portion forwardly of cutting portion
175393, 175408, E21B 1026
Patent
active
060068450
ABSTRACT:
A rotary drag bit being suitable for directional drilling. The bit includes a bit body from which extend radially-oriented blades carrying PDC cutters. The blades extend to primary gage pads, above which secondary gage pads are either longitudinally spaced or rotationally spaced, or both, defining a gap or discontinuity between the primary and secondary gage pads through which drilling fluid from adjacent junk slots may communicate laterally or circumferentially. Longitudinally leading edges of the secondary gage pads carry cutters for smoothing the sidewall of the borehole. The tandem primary and secondary gage pads provide enhanced bit stability and reduced side cutting tendencies. The discontinuities between the primary and secondary gage pads enhance fluid flow from the bit face to the borehole annulus above the bit, promoting formation cuttings removal. The tandem gage arrangement also has utility in conventional bits not designed specifically for directional drilling.
REFERENCES:
patent: 2553701 (1951-05-01), Comstock
patent: 3318400 (1967-05-01), Hildebrandt
patent: 3322218 (1967-05-01), Hildebrandt
patent: 3367430 (1968-02-01), Rowley
patent: 3575247 (1971-04-01), Feenstra
patent: 3628616 (1971-12-01), Neilson
patent: 3820611 (1974-06-01), King
patent: 3825083 (1974-07-01), Flarity et al.
patent: 3871488 (1975-03-01), Sabre
patent: 3978933 (1976-09-01), Olson et al.
patent: 4073354 (1978-02-01), Rowley et al.
patent: 4221270 (1980-09-01), Vezirian
patent: 4244432 (1981-01-01), Rowley et al.
patent: 4246977 (1981-01-01), Allen
patent: 4385669 (1983-05-01), Knutsen
patent: 4429755 (1984-02-01), Williamson
patent: 4545441 (1985-10-01), Williamson
patent: 4602691 (1986-07-01), Weaver
patent: 4673044 (1987-06-01), Bigelow et al.
patent: 4676324 (1987-06-01), Barr et al.
patent: 4714120 (1987-12-01), King
patent: 4869330 (1989-09-01), Tibbitts
patent: 4941538 (1990-07-01), King
patent: 5004057 (1991-04-01), Tibbits et al.
patent: 5033559 (1991-07-01), Fischer
patent: 5033560 (1991-07-01), Sawyer et al.
patent: 5163524 (1992-11-01), Newton, Jr. et al.
patent: 5415243 (1995-05-01), Lyon et al.
patent: 5467836 (1995-11-01), Grimes et al.
patent: 5558170 (1996-09-01), Thigpen et al.
patent: 5601151 (1997-02-01), Warren
patent: 5651421 (1997-07-01), Newton et al.
patent: 5655612 (1997-08-01), Grimes et al.
Beuershausen Christopher C.
Dykstra Mark W.
Illerhaus Roland
Norris James A.
Ohanian Michael P.
Bagnell David
Baker Hughes Incorporated
Lee Jong-Suk
LandOfFree
Rotary drill bits for directional drilling employing tandem gage does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary drill bits for directional drilling employing tandem gage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary drill bits for directional drilling employing tandem gage will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2376425