Drill bit and improved cutting element
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United States of America Patent
Stats
-
Feb 16, 1988
Grant Date -
N/A
app pub date -
Feb 18, 1983
filing date -
Feb 18, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein having polycrystalline diamond cutting elements mounted on said inserts. The diamond cutting elements have a novel cutting shape facilitating drilling through hard formations with a minimum of applied weight on the bit. The cutting elements are in the shape of a relatively large disc shaped cutter commonly used for medium and soft formations but have the sides shaped into a cutting edge of substantially smaller radius. The cutting element has the strength and resistance to breakdown of the larger disc but the cutting capacity in hard formations of a smaller diameter cutter. The cutting elements are also disclosed as novel components of the drill.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- DIAMANT BOART-STRATABIT (USA) INC., A CORP. OF DE.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Morris, Wilford V | Houston, TX | 4 | 184 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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