Percussive drill bit

Details Percussive drill bit Percussive drill bit

2004-06-11

2009-06-16

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

C175S414000

Reexamination Certificate

active

07546888

ABSTRACT:
A percussion drill bit for drilling into a subterranean earth formation. The drill bit has a central longitudinal axis and is operable by applying repetitive axial percussive impacts on the drill bit in a direction having a component along the axis and by applying rotary motion about the axis relative to the earth formation. The drill bit is provided with one or more axial cutters for predominantly axially cutting the subterranean earth formation in response to the axial percussive impacts and one or more shear cutters for predominantly shear cutting the subterranean earth formation in response to the rotary motion. There is a first shear cutter of the one or more shear cutters, and one or more of the axial cutters are arranged with respect to the first shear cutter to engage with the subterranean earth formation earlier during a percussive impact than the first shear cutter.

REFERENCES:
patent: 2998085 (1961-08-01), Dulaney
patent: 3140748 (1964-07-01), Engle et al.
patent: 3258077 (1966-06-01), Phipps
patent: 3269470 (1966-08-01), Kelly, Jr.
patent: 3388756 (1968-06-01), Varel et al.
patent: 3709308 (1973-01-01), Rowley et al.
patent: 3788409 (1974-01-01), Curington
patent: 3955635 (1976-05-01), Skidmore
patent: 4051912 (1977-10-01), White
patent: 4296825 (1981-10-01), Larsson
patent: 4558753 (1985-12-01), Barr
patent: 4607712 (1986-08-01), Larsson
patent: 4676324 (1987-06-01), Barr et al.
patent: 4716976 (1988-01-01), Isakov
patent: 4823892 (1989-04-01), Fuller
patent: 4991670 (1991-02-01), Fuller et al.
patent: 5004056 (1991-04-01), Goikhman et al.
patent: 5025875 (1991-06-01), Witt
patent: 5244039 (1993-09-01), Newton, Jr. et al.
patent: 5460233 (1995-10-01), Meany et al.
patent: 5595252 (1997-01-01), O'Hanlon
patent: 5601477 (1997-02-01), Bunting et al.
patent: 5890551 (1999-04-01), Liljebrand et al.
patent: 5992547 (1999-11-01), Caraway et al.
patent: 6202770 (2001-03-01), Jurewicz et al.
patent: 6253864 (2001-07-01), Hall
patent: 6290002 (2001-09-01), Comeau et al.
patent: 6527065 (2003-03-01), Tibbitts et al.
patent: 6672406 (2004-01-01), Beuershausen
patent: 6918455 (2005-07-01), Meyers et al.
patent: 7104344 (2006-09-01), Kriesels et al.
patent: 2002/0066601 (2002-06-01), Meiners et al.
patent: 2005/0269139 (2005-12-01), Shen et al.
patent: 2006/0249309 (2006-11-01), Cruz
patent: 4200580 (1993-03-01), None
patent: 0563561 (1993-10-01), None
patent: 01/33031 (2001-05-01), None
patent: 02/099242 (2002-12-01), None
patent: 03/004249 (2003-01-01), None
patent: 03/031763 (2003-04-01), None
patent: 03/042492 (2003-05-01), None
patent: 2004/104362 (2004-02-01), None
patent: 2004/104363 (2004-02-01), None
patent: WO2004111381 (2004-12-01), None

Affiliated with

Also associated with

Rating

Percussive drill 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 Percussive drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Percussive drill bit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4149050