Anti-tracking earth boring bit with selected varied pitch...

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

C175S376000

Reexamination Certificate

active

10768532

ABSTRACT:
An earth boring drill bit is constructed having rotatable cutter for forming a borehole in earth. At least one circumferential row of cutting elements is optimized to create overbreak of rock and eliminate tracking, wherein selected pitches have mathematically determined pairs and the absolute difference between the selected pitch and its pair is greater than 10% of the difference between maximum and minimum pitch for that circumferential row. Furthermore, cutting elements are placed along pre-selected generatrices with deviation from said generatrices, which is less than half the maximum pitch of circumferential rows occupied by said cutting element. The present invention eliminates tracking and reduces detrimental axial resonance frequency vibration while reducing cutting element count, including tungsten-carbide inserts, as compared to conventional roller cutter drill bits used for oil, gas and shot hole drilling wells and simultaneously increases footage drilled, drilling speed, and durability.

REFERENCES:
patent: 1708288 (1929-04-01), Wadsworth
patent: 3726350 (1973-04-01), Pessier
patent: 4187922 (1980-02-01), Phelps
patent: 4202419 (1980-05-01), Youngblood
patent: 4393948 (1983-07-01), Fernandez
patent: 4427081 (1984-01-01), Crawford
patent: 4815342 (1989-03-01), Brett et al.
patent: 5197555 (1993-03-01), Estes
patent: 5224560 (1993-07-01), Fernandez
patent: 5372210 (1994-12-01), Harrell
patent: 5415030 (1995-05-01), Jogi et al.
patent: 5704436 (1998-01-01), Smith et al.
patent: 5730234 (1998-03-01), Putot
patent: 5767399 (1998-06-01), Smith et al.
patent: 5794720 (1998-08-01), Smith et al.
patent: 6095262 (2000-08-01), Chen
patent: 6213225 (2001-04-01), Chen
patent: 6401839 (2002-06-01), Chen
patent: 6412577 (2002-07-01), Chen
patent: 6516293 (2003-02-01), Huange et al.
patent: 2003/0051918 (2003-03-01), Chen
patent: 2004/0230413 (2004-11-01), Chen

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

Anti-tracking earth boring bit with selected varied pitch... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Anti-tracking earth boring bit with selected varied pitch..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-tracking earth boring bit with selected varied pitch... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3732772

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