Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2007-02-23
2010-10-12
Stephenson, Daniel P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C076S108100, C076S108400, C051S295000
Reexamination Certificate
active
07810588
ABSTRACT:
A method of constructing an earth-boring, diamond-impregnated drill bit has a first step of coating diamond grit with tungsten to create tungsten-coated diamond particles. These coated particles are then encapsulated in a layer of carbide powder held by an organic green binder material. The encapsulated granules are then mixed along with a matrix material and placed in a mold. The matrix material includes a matrix binder and abrasive particles. The mixture is heated in the mold at atmospheric pressure to cause the matrix binder to melt and infiltrate the encapsulated granules and abrasive particles.
REFERENCES:
patent: 3841852 (1974-10-01), Wilder et al.
patent: 3871840 (1975-03-01), Wilder et al.
patent: 4943488 (1990-07-01), Sung et al.
patent: 5024680 (1991-06-01), Chen et al.
patent: 5049164 (1991-09-01), Horton et al.
patent: 5062865 (1991-11-01), Chen et al.
patent: 5106392 (1992-04-01), Slutz et al.
patent: 5126207 (1992-06-01), Chen et al.
patent: 5143523 (1992-09-01), Matarrese
patent: 5224969 (1993-07-01), Chen et al.
patent: 5405573 (1995-04-01), Clark et al.
patent: 6238280 (2001-05-01), Ritt et al.
patent: 6241036 (2001-06-01), Lovato et al.
patent: 2006/0081402 (2006-04-01), Lockwood et al.
patent: 0012 631 (1980-06-01), None
patent: 762175 (1971-03-01), None
New Diamond TECH2000 Hardfacing Increases Life and Improves Performance of PSF/MPSF Premium Steel Tooth Bits, three pages.
Brackin Van J.
Eason Jimmy W.
Fuller Wesley Dean
McClain Eric E.
Scott Dan E.
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Stephenson Daniel P
LandOfFree
Multi-layer encapsulation of diamond grit for use in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-layer encapsulation of diamond grit for use in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer encapsulation of diamond grit for use in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4181589