Chamfered edge gage cutters and drill bits so equipped

Details Chamfered edge gage cutters and drill bits so equipped Chamfered edge gage cutters and drill bits so equipped

2008-08-26

2011-11-22

Gay, Jennifer H (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

Reexamination Certificate

active

08061456

ABSTRACT:
A cutting element for an earth boring bit, may include a PDC layer having a flat on a periphery thereof, the flat terminating longitudinally at an edge spaced from a cutting face of the PDC layer. A chamfer adjacent to the cutting face desirably has a length that exceeds its depth. A cutting element may additionally include a chamfer along the entire circumference, multiple step-wise, radially adjacent chamfers, and multiple circumferentially spaced portions of the uppermost radius of the PDC layer of the cutting element that each includes a chamfer with an associated flat. Additionally, a cutting element may include a flat terminating at a radial edge with the cutting face of a PDC layer.

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