Drill bit cutter element having multiple cusps

Details Drill bit cutter element having multiple cusps Drill bit cutter element having multiple cusps

2005-08-16

2005-08-16

Tsay, Frank S. (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

C175S431000, C175S430000

Reexamination Certificate

active

06929079

ABSTRACT:
Cutter elements for use in rolling cones rock bits are disclosed having a crown that includes multiple, spaced-apart cusps for enhancing formation removal by creating overlapping Hertzian contact zones. The cusps may be partially dome-shaped, berm shaped or otherwise. The cutter elements provide multiple cutting edges for engaging the formation and may have differing radii and extension length as suitable for particular applications.

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Search Report for Appln. No. GB0402108.5, dated Apr. 22, 2004; (1 p.).
Search Report for Appln. No. GB0403620.8, dated May 5, 2004; (2 p.).

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