Multi-lobed cutter element for drill bit

Details Multi-lobed cutter element for drill bit Multi-lobed cutter element for drill bit

2005-04-26

2005-04-26

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C175S335000, C175S430000

Reexamination Certificate

active

06883624

ABSTRACT:
Cutter elements for a drill bits having particular, but not exclusive, application on the nose portion of the cone cutters of a rolling cone bit include a base, a cutting portion, and a plurality of cutting lobes extending radially from the cutting portion. Each lobe includes a forward-facing cutting face and trailing portion having a trailing surface that intersects the cutting face in a nonlinear cutting edge. The trailing surface is non-planar and recedes away from the cutting edge. In certain embodiments, the trailing surface is a partial dome shaped surface. The trailing portion provides strength and buttresses the cutting edge.

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Search Report for Appln. No GB 0403620.8, dated May 5, 2004 (2 p.).*
Search Report for Appln. No. GB0402108.5, dated Apr. 22, 2004; (1 p.).

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