Drag bit and cutters
Patent
·
OSTI ID:5866372
A drill bit comprises a bit body having an operating end face. A plurality of self-sharpening cutters are mounted in the bit body and extend through the operating end face. The cutters have cutting faces adapted to engage an earth formation and cut the earth formation to a desired three-dimensional profile. The cutting faces define surfaces having back rake angles which decrease with distance from the profile. The individual cutting faces may be inwardly concave in a plane parallel to the intended direction of motion of the cutter in use.
- Assignee:
- NL Industries Inc.
- Patent Number(s):
- US 4558753
- OSTI ID:
- 5866372
- Country of Publication:
- United States
- Language:
- English
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020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
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CARBIDES
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DESIGN
DIAMONDS
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MECHANICAL PROPERTIES
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