Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2006-06-13
2006-06-13
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
C175S340000
Reexamination Certificate
active
07059430
ABSTRACT:
A novel rolling cone rock bit includes a plurality of PDC or other cutters mounted to the leg of the drill bit and positioned to cut the troublesome corner of the bottomhole. The plurality of cutters may be the primary cutting component at gage diameter, or may be redundant to gage teeth on a rolling cutter that cut to gage diameter. Consequently, the occurrence of undergage drilling from the wear and failure of the gage row on a rolling cutter is lessened. Another inventive feature is the inclusion of a mud ramp that creates a large junk slot from the borehole bottom up the drill bit. The resulting pumping action of the drill bit ramp speeds up the removal of chips or drilling cuttings from the bottom of the borehole, reduces the level of hydrostatic pressure at the bottom of the borehole and minimizes the wearing effect of cone inserts regrinding damaging drill cuttings.
REFERENCES:
patent: 1729063 (1929-09-01), Bull
patent: 3344870 (1967-10-01), Morris
patent: 3628616 (1971-12-01), Neilson
patent: 4140189 (1979-02-01), Garner
patent: 4167980 (1979-09-01), Saxman
patent: 4444281 (1984-04-01), Schumacher, Jr. et al.
patent: 4591008 (1986-05-01), Oliver
patent: RE32495 (1987-09-01), Coates
patent: 4936398 (1990-06-01), Auty et al.
patent: 5064007 (1991-11-01), Kaalstad
patent: 5074367 (1991-12-01), Estes
patent: 5145016 (1992-09-01), Estes
patent: 5289889 (1994-03-01), Gearhart et al.
patent: 5415243 (1995-05-01), Lyon et al.
patent: 5494123 (1996-02-01), Nguyen
patent: 5553681 (1996-09-01), Huffstutler et al.
patent: 5697462 (1997-12-01), Grimes et al.
patent: 5709278 (1998-01-01), Crawford
patent: 5746280 (1998-05-01), Scott et al.
patent: 5755301 (1998-05-01), Love et al.
patent: 5839526 (1998-11-01), Cisneros et al.
patent: 5862871 (1999-01-01), Curlett
patent: 5890550 (1999-04-01), Swadi et al.
patent: 5996713 (1999-12-01), Pessier et al.
patent: 6123160 (2000-09-01), Tibbitts
patent: 6142248 (2000-11-01), Thigpen et al.
patent: 6173797 (2001-01-01), Dykstra et al.
patent: 6227314 (2001-05-01), Zadrapa et al.
patent: 6474423 (2002-11-01), Wood
patent: 2 309 242 (1997-07-01), None
patent: 2 349 661 (2000-11-01), None
U.K. Search Report for Appln. No. GB 0113771.0 Dated Oct. 31, 2001; (3 p.).
Huang Sujian
Nguyen Quan V.
Singh Amardeep
Conley & Rose, P.C.
Dang Hoang
Smith International Inc.
LandOfFree
Hydro-lifter rock bit with PDC inserts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydro-lifter rock bit with PDC inserts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydro-lifter rock bit with PDC inserts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3644500