Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2006-02-14
2006-02-14
Gay, Jennifer H (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S377000
Reexamination Certificate
active
06997273
ABSTRACT:
The cutter element includes a rounded apex offset from the center line of the insert and having a relatively broad and blunt front face and a narrower, more rounded rear face. The cutter element may be disposed in the outermost inner row of a rolling cone cutter of a bit with the broader front face facing the borehole side wall so as to resist off center wear and resultant bit whirl. When placed in inner rows and oriented with the broader and flatter front face being the first portion of the cutting surface to engage the borehole, enhancements in bit durability may be achieved, particularly when drilling through formations of multiple hardness.
REFERENCES:
patent: 3442352 (1969-05-01), McElya et al.
patent: 4056153 (1977-11-01), Miglierini
patent: 4058177 (1977-11-01), Langford, Jr. et al.
patent: 4086973 (1978-05-01), Keller et al.
patent: 4108260 (1978-08-01), Bozarth
patent: 4334586 (1982-06-01), Schumacher
patent: 4716977 (1988-01-01), Huffstutler
patent: 4722405 (1988-02-01), Langford, Jr.
patent: 4832139 (1989-05-01), Minikus et al.
patent: 4951762 (1990-08-01), Lundell
patent: 5172777 (1992-12-01), Siracki et al.
patent: 5172779 (1992-12-01), Siracki et al.
patent: 5197555 (1993-03-01), Estes
patent: 5201376 (1993-04-01), Williams
patent: 5322138 (1994-06-01), Siracki
patent: 5323865 (1994-06-01), Isbell et al.
patent: 5341890 (1994-08-01), Cawthorne et al.
patent: 5351768 (1994-10-01), Scott et al.
patent: 5372210 (1994-12-01), Harrell
patent: 5407022 (1995-04-01), Scott et al.
patent: 5415244 (1995-05-01), Portwood
patent: 5421423 (1995-06-01), Huffstutler
patent: 5421424 (1995-06-01), Portwood et al.
patent: 5429200 (1995-07-01), Blackman et al.
patent: 5452771 (1995-09-01), Blackman et al.
patent: 5479997 (1996-01-01), Scott et al.
patent: 5518077 (1996-05-01), Blackman et al.
patent: 5542485 (1996-08-01), Pessier et al.
patent: 5592995 (1997-01-01), Scott et al.
patent: 5636700 (1997-06-01), Shamburger, Jr.
patent: 5644956 (1997-07-01), Blackman et al.
patent: 5695019 (1997-12-01), Shamburger, Jr.
patent: 5697462 (1997-12-01), Grimes et al.
patent: 5709278 (1998-01-01), Crawford
patent: 5746280 (1998-05-01), Scott et al.
patent: 5752573 (1998-05-01), Scott et al.
patent: 5755301 (1998-05-01), Love et al.
patent: 5813485 (1998-09-01), Portwood
patent: 5819861 (1998-10-01), Scott et al.
patent: 5833020 (1998-11-01), Portwood et al.
patent: 5839526 (1998-11-01), Cisneros et al.
patent: 5881828 (1999-03-01), Fischer et al.
patent: 5887655 (1999-03-01), Haugen et al.
patent: 5887668 (1999-03-01), Haugen et al.
patent: 5890550 (1999-04-01), Swadi et al.
patent: 5915486 (1999-06-01), Portwood et al.
patent: 5967245 (1999-10-01), Garcia et al.
patent: 6029759 (2000-02-01), Sue et al.
patent: 6053263 (2000-04-01), Meiners
patent: 6059054 (2000-05-01), Portwood et al.
patent: 6202752 (2001-03-01), Kuck et al.
patent: 6241034 (2001-06-01), Steinke et al.
patent: 2001/0004026 (2001-06-01), Lockstedt et al.
patent: 2005/0023043 (2005-02-01), Tufts
patent: 0 527 506 (1993-02-01), None
Conley & Rose, P.C.
Gay Jennifer H
Smith International Inc.
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