Drill bit and cutter element having aggressive leading side

Details Drill bit and cutter element having aggressive leading side Drill bit and cutter element having aggressive leading side

2005-10-18

2009-12-01

Bomar, Shane (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C175S426000, C175S431000

Reexamination Certificate

active

07624825

ABSTRACT:
A cutter element for a drill bit includes a leading cutting surface and a trailing cutting surface. The leading surface includes a top surface and a front surface that meet in a radiused intersection forming a forward-facing, non-linear crest of non-uniform radius. The radius of the crest is smallest at the forward-most portion, and greater at each end. The crest has its largest radius at a location between its forward-most portion and one of its ends. The cutter element may be employed in the corner cutting portion of a rolling cone cutter in a drill bit, the cutter element being positioned such that the forward-most portion of the crest first engages the formation material, with the crest end having the largest radius being closest to the pin end of the bit.

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