Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2007-06-26
2007-06-26
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S434000
Reexamination Certificate
active
10696535
ABSTRACT:
An insert for a drill bit which includes a diamond impregnated body, and a shearing portion disposed on said body is shown. In addition, a method for forming a drill bit that includes (a) forming a shearing portion on a diamond-impregnated insert body to form a cutting insert, (b) forming a bit body having a plurality of sockets sized to receive a plurality of the cutting inserts, and (c) mounting the plurality of cutting inserts in the bit body and affixing the plurality of cutting inserts to the bit body; wherein steps (a)–(c) are carried out such that a total exposure of the diamond-impregnated insert to temperatures above 1000° F. is greater than a total exposure of the shearing portion to temperatures above 1000° F.
REFERENCES:
patent: 3318399 (1967-05-01), Garner
patent: 4699227 (1987-10-01), Wardley
patent: 4718505 (1988-01-01), Fuller
patent: 4919220 (1990-04-01), Fuller et al.
patent: 4943488 (1990-07-01), Sung et al.
patent: 5045092 (1991-09-01), Keshavan
patent: 5159857 (1992-11-01), Jurewicz
patent: 5217081 (1993-06-01), Waldenstrom et al.
patent: 5279374 (1994-01-01), Sievers et al.
patent: 5351770 (1994-10-01), Cawthorne et al.
patent: 6193000 (2001-02-01), Caraway et al.
patent: 6315066 (2001-11-01), Dennis
patent: 2001/0047891 (2001-12-01), Traux et al.
patent: 2002/0125048 (2002-09-01), Traux et al.
patent: 2 198 169 (1988-06-01), None
patent: 2 324 553 (1998-10-01), None
Great Britian Application No. GB0403176.1 Combined Search and Examination Report dated Apr. 27, 2004 (6 pages).
Office Action issued in corresponding Canadian Pat. application No. 2,457,369 dated Mar. 6, 2006 (3 pages).
Azar Michael George
Chunn Gary
Ray Tommy Gene
Thiele Jonathan Craig
Dang Hoang
Osha & Liang LLP
Smith International Inc.
LandOfFree
Bits and cutting structures does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bits and cutting structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bits and cutting structures will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3872025