Two-cone drill bit with enhanced stability

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C175S431000

Reexamination Certificate

active

07316281

ABSTRACT:
A two-cone drill bit that exhibits improved stability. In one embodiment, the two-cone drill bit has a first and a second roller cone arranged to have a cone separation angle between about 145 degrees and about 166 degrees. In some embodiments, the two-cone drill bit has a plurality of cutting elements arranged on the roller cones such that a bottom hole coverage greater than about 17 percent is achieved per revolution of the two-cone drill bit.

REFERENCES:
patent: 2340492 (1944-02-01), Scott
patent: 2367637 (1945-01-01), Zublin
patent: 3207241 (1965-09-01), Neilson
patent: 3265139 (1966-08-01), Haden et al.
patent: 3329222 (1967-07-01), Neilson
patent: 4067406 (1978-01-01), Garner et al.
patent: 4156123 (1979-05-01), Fischer et al.
patent: 4258807 (1981-03-01), Fischer et al.
patent: 4285409 (1981-08-01), Allen
patent: 4408671 (1983-10-01), Munson
patent: 4763736 (1988-08-01), Varel, Sr.
patent: 4953641 (1990-09-01), Pessier
patent: 5111894 (1992-05-01), Williams, Jr.
patent: 5244050 (1993-09-01), Estes
patent: RE34526 (1994-02-01), Pessier
patent: 5586612 (1996-12-01), Isbell et al.
patent: 5996713 (1999-12-01), Pessier et al.
patent: 6601660 (2003-08-01), Xiang et al.
patent: 1223779 (1966-09-01), None
patent: 0 395 572 (1990-10-01), None
patent: 0395572 (1990-10-01), None
patent: 1 469 525 (1977-04-01), None
patent: 2 297 338 (1996-07-01), None
patent: 1670084 (1988-09-01), None
patent: 1745860 (1989-12-01), None
patent: 00/12860 (2000-03-01), None
patent: 00/29709 (2000-05-01), None
Combined Search and Examination Report dated Sep. 11, 2006 for Application No. GB0518244.9 (6 pages).
Canadian Office Action dated May 1, 2006 for Application No. 2,517,761 (4 pages).
Combined Search and Examination Report dated Jan. 3, 2007 for Application No. GB0624490.9 (3 pages).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Two-cone drill bit with enhanced stability does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-cone drill bit with enhanced stability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-cone drill bit with enhanced stability will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2755019

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.