Rotary drill bits

Details Rotary drill bits Rotary drill bits

1995-10-10

1997-09-30

Tsay, Frank

Boring or penetrating the earth

Bit or bit element

With fluid conduit lining or element

E21B 1060

Patent

active

056718187

ABSTRACT:
A rotary drill bit for use in drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, a number of blades formed on the leading face of the bit and extending outwardly away from the axis of the bit so as to define between the blades a number of fluid channels leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles in the bit body for supplying drilling fluid to the fluid channels for cleaning and cooling the cutting elements. In at least one of the fluid channels, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet which, in use, communicates with the annulus between the drill string and the wall of the borehole being drilled. The portion of the gauge region outwardly of the opening comprises a bearing surface which, in use bears against the wall of the bore hole and extends across the width of the channel.

REFERENCES:
patent: 3111179 (1963-11-01), Albers et al.
patent: 3951220 (1976-04-01), Phillips, Jr. et al.
patent: 4733735 (1988-03-01), Barr et al.
patent: 5029657 (1991-07-01), Mahar et al.
patent: 5145017 (1992-09-01), Holster et al.
patent: 5199511 (1993-04-01), Tibbitts et al.
patent: 5244039 (1993-09-01), Newton et al.
patent: 5417296 (1995-05-01), Murdock
patent: 5452628 (1995-09-01), Montgomery, Jr. et al.

Affiliated with

Also associated with

Rating

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 Rotary drill bits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary drill bits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2251157