Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1998-06-16
2000-07-04
Evans, Geoffrey S.
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
E21B 1046
Patent
active
060824743
ABSTRACT:
A preform element, such as a preform cutting element for a rotary drag-type drill bit, includes a facing table of polycrystalline diamond having a front face, a peripheral surface, and a rear surface bonded to the front surface of a tungsten carbide substrate. The front surface of the substrate is formed with a plurality of recesses into which extend corresponding projections formed on the rear surface of the facing table. The recesses include at least one rebate which extends around only a part of the periphery of the substrate and into which extends a projection on the facing table which provides a part of the peripheral surface of the facing table.
REFERENCES:
patent: 4784023 (1988-11-01), Dennis
patent: 5120327 (1992-06-01), Dennis
patent: 5351772 (1994-10-01), Smith
patent: 5590728 (1997-01-01), Matthias et al.
patent: 5709279 (1998-01-01), Dennis
patent: 5788001 (1998-08-01), Matthias et al.
patent: 5888619 (1999-03-01), Griffin
Camco International Limited
Daly Jeffrey E.
Evans Geoffrey S.
LandOfFree
Elements faced with superhard material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Elements faced with superhard material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elements faced with superhard material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1477777