Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device
Patent
1994-10-04
1996-02-27
Buiz, Michael Powell
Boring or penetrating the earth
Bit or bit element
With bit guide or bore wall compacting device
175332, E21B 1046
Patent
active
054941237
ABSTRACT:
A rotary cone rock bit has bearing inserts pressed into the side of the shirttail portion of the rock bit body for stabilizing the rock bit during drilling. Such a rock bit has a steel bit body with a threaded upper pin for connection to a drill string. Cutter cones are mounted on lower leg portions of the rock bit body. The rock bit body gradually decreases in diameter from the gage diameter adjacent the lower tips of the shirttails adjacent to the cones to a smaller diameter shoulder the pin end of the body. The lowermost bearing insert protrudes laterally from the gradually decreasing diameter part of the bit body approximately half way between the lower tip of the shirttail and the shoulder at the upper end of the shirttail. The outer ends of the bearing inserts are rounded and substantially at the gage diameter of the bit for bearing on the wall of the borehole being drilled without appreciably reaming the borehole. The bearing inserts may have a layer of polycrystalline diamond on the protruding ends for minimizing wear. The protruding bearing inserts stabilize the bit without disrupting fluid flow around the bit.
REFERENCES:
patent: 3120285 (1994-02-01), Rowley
patent: 3134447 (1964-05-01), McElya et al.
patent: 3628616 (1971-12-01), Neilson
patent: 4140189 (1979-02-01), Garner
patent: 5074367 (1991-12-01), Estes
patent: 5394952 (1995-03-01), Johns et al.
Varel Manufacturing Company brochure "Varel Rock Bits" publicaiton date, prior to Oct. 4, 1993.
Buiz Michael Powell
Smith International Inc.
LandOfFree
Drill bit with protruding insert stabilizers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill bit with protruding insert stabilizers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill bit with protruding insert stabilizers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1673014