Cutting Element Attached to Downhole Fixed Bladed Bit at a Positive Rake
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Ronald B. Crockett, Marcus Skeem, Francis Leany, Casey Webb
Life of this patent
Estimating the term…
Abstract
In one aspect of the present invention, a downhole fixed bladed bit comprises a working surface comprising a plurality of blades converging at a center of the working surface and diverging towards a gauge of the bit, at least on blade comprising a cutting element comprising a superhard material bonded to a cemented metal carbide substrate at a non-planer interface, the cutting element being positioned at a positive rake angle, and the superhard material comprising a substantially conical geometry with an apex comprising a curvature.
Claims20
A downhole fixed bladed bit, comprising:
- a working surface comprising a plurality of blades converging at a center of the working surface and diverging towards a gauge of the bit;
- at least one blade comprising a cutting element comprising a superhard material bonded to a cemented metal carbide substrate at a non-planar interface;
- the cutting element being positioned at a positive rake angle;
- and
- the superhard material comprising a substantially pointed geometry with an apex comprising a curvature.
Dependencies are inferred from the claim text.