Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2006-10-31
2006-10-31
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
active
07128173
ABSTRACT:
An earth-boring bit has a mechanical face seal assembly with PCD faces. The bit has a bearing shaft with a cone rotatably mounted on the bearing shaft. The seal locates between the bearing shaft and the cone for sealing lubricant therein. The seal includes at least one rigid seal ring having a cemented carbide body and an annular PCD face located on it. The mating face may also be of a PCD material. The cemented carbide body contains a binder that migrates into the PCD face while the PCD face is being formed. A binder-free region is leached on the surface of the PCD face.
REFERENCES:
patent: 4224380 (1980-09-01), Bovenkerk et al.
patent: 4255165 (1981-03-01), Dennis et al.
patent: 4398952 (1983-08-01), Drake
patent: 4516641 (1985-05-01), Burr
patent: 4765950 (1988-08-01), Johnson
patent: 4793828 (1988-12-01), Burnand
patent: 5049164 (1991-09-01), Horton et al.
patent: 5108813 (1992-04-01), Noda et al.
patent: 5176720 (1993-01-01), Martell et al.
patent: 5304342 (1994-04-01), Hall, Jr. et al.
patent: 5351772 (1994-10-01), Smith
patent: 5472058 (1995-12-01), Hooper et al.
patent: 5603385 (1997-02-01), Colebrook
patent: 6026917 (2000-02-01), Zahradnik et al.
patent: 6068070 (2000-05-01), Scott
patent: 6200524 (2001-03-01), Griskin et al.
patent: 0614999 (1994-09-01), None
patent: 0675303 (1998-07-01), None
patent: 2278865 (1994-12-01), None
patent: 2288617 (1995-10-01), None
patent: 2332461 (1999-06-01), None
Article entitledSyndite PCD Wear-Resistant Parts, A. Lammer, 5 pgs, undated.
Article entitledFriction&Wear Behaviour of Syndite PCD, K. Steinmetz, et al. 6 pgs, undated.
Bagnell David
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Smith Matthew J.
LandOfFree
PCD face seal for earth-boring bit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with PCD face seal for earth-boring bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PCD face seal for earth-boring bit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3657465