Arrangement of roller cone inserts

Details Arrangement of roller cone inserts Arrangement of roller cone inserts

2006-11-07

2009-06-23

Bagnell, David J (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Nonsymmetrical bit

C175S376000, C175S378000, C175S431000

Reexamination Certificate

active

07549490

ABSTRACT:
A drill bit having cutting elements disposed on a roller cone surface in a non-linear pattern, wherein at least one of the cutting elements is asymmetrical to its axis of orientation. Also, a method for selecting and adjusting a cutting element orientation based on crater profile geometry which results in increased bottom hole coverage.

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Combined Search and Examination Report issued in corresponding British Application No. GB0623298.7; Dated Feb. 12, 2007; 8 pages.
Official Action from the Canadian Patent Office dated Mar. 10, 2008 (2 pages).
Examination Report issued in corresponding GB Application No. GB0623298.7, dated May 12, 2008, (5 pages).

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