Rotary drill bits

Details Rotary drill bits Rotary drill bits

1986-09-29

1988-03-29

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

With fluid conduit lining or element

175417, 175424, E21B 1060

Patent

active

047337354

ABSTRACT:
A rotary drill bit comprises a bit body having a leading face and a gauge region, a number of blades on the leading face of the bit body, and a number of cutting elements mounted along each blade. A passage in the bit body supplies drilling fluid to nozzles in the leading face of the bit body for cooling and cleaning the cutting elements. Each nozzle is so oriented, and the surface of the bit body in the region in front of each blade is so shaped, as to promote a vortex flow of drilling fluid around said region, with part of the periphery of the vortex extending across the cutting elements on the blade, so that fluid in the periphery of the vortex passes across the cutting elements mounted on each blade before escaping through an exit channel in the gauge region.

REFERENCES:
patent: 207439 (1950-05-01), Goolsbee
patent: 2246812 (1941-06-01), Pivoto
patent: 2498251 (1950-02-01), Creel
patent: 3011571 (1961-12-01), Bree et al.
patent: 3951220 (1976-04-01), Phillips, Jr. et al.
patent: 4336850 (1982-06-01), Fielder
patent: 4440247 (1984-04-01), Saitor
patent: 4499958 (1985-02-01), Radtke et al.
patent: 4527642 (1985-07-01), Knowlton et al.
patent: 4577706 (1986-03-01), Barr
patent: 4687066 (1987-08-01), Evans

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