Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1997-07-28
2000-01-04
Dang, Hoang
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175434, E21B 1046
Patent
active
060099623
ABSTRACT:
A rotary drill bit comprises a bit body having a leading surface formed at least in part from solid infiltrated matrix material, a major part of the leading surface being impregnated with abrasive particles of diamond or other superhard material. There are also mounted at the leading surface a plurality of larger cutting elements having cutting edges formed of superhard material which project above the surface, the larger cutting elements being so spaced as to define a substantially continuous cutting profile, so that the cutting elements in combination sweep over the whole of a bottom of a hole being drilled by the bit, during each revolution. The abrasive particles normally carry out the majority of the drilling action in hard formations, but the larger cutting elements serve to cut more rapidly through temporary obstructions which may be encountered in the borehole, such as a shoetrack.
REFERENCES:
patent: 2371488 (1945-03-01), Williams, Jr.
patent: 3537538 (1970-11-01), Generoux
patent: 3709308 (1973-01-01), Rowley et al.
patent: 3885637 (1975-05-01), Veprintsev et al.
patent: 3938599 (1976-02-01), Horn
patent: 4200159 (1980-04-01), Peschel et al.
patent: 4266621 (1981-05-01), Brock
patent: 4350215 (1982-09-01), Radtke
patent: 4351401 (1982-09-01), Fielder
patent: 4554986 (1985-11-01), Jones
patent: 5090491 (1992-02-01), Tibbitts et al.
R.J. Gentges: "Proper bit design improves penetration rate in abrasive horizontal wells", Oil and Gas Journal Aug. 9, 1993, vol. 91 No. 32, pp. 39-42.
Camco International (UK) Limited
Dang Hoang
LandOfFree
Impregnated type rotary drill bits does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impregnated type rotary drill bits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impregnated type rotary drill bits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1065348