System, method, and apparatus for predicting tracking by...

Details System, method, and apparatus for predicting tracking by... System, method, and apparatus for predicting tracking by...

2011-08-23

2011-08-23

Neuder, William P (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S378000

Reexamination Certificate

active

08002053

ABSTRACT:
Embodiments of a system, method, and apparatus for predicting and reducing tracking by roller cone bits by adjusting compact spacing are disclosed. Different pitches between adjacent compacts or teeth provide a cone row that is substantially less likely to track. A given row on a cone may include compacts that are arrayed at a single pitch in a contiguous group for approximately half of the row. The remaining approximately half of the row includes alternating pitches. This configuration enables anti-tracking behavior without very wide spaces and consequent breakage and wear seen in prior art anti-tracking pitch schemes.

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International Search Report PCT/US2008/073247, mailed Dec. 23, 2008. 4 pages.

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