Design of special performance bits utilizing synthetic diamond cutters
A new technique (diffusion bonding) for attaching synthetic, polycrystalline diamond cutters to drill bits has been developed by Sandia Laboratories with funding from the Department of Energy. To test the diffusion bonding technique and some new bit design concepts, Sandia is designing several types of special performance bits utilizing synthetic diamond compacts. Two all-compact bits, a hybrid diamond-compact/roller-cone bit, and two coring bits are being built for testing in laboratory and field environments. A special coring bit designed to operate with a pressure coring system and to be cleaned and cooled with a small quantity of low-invasion coring fluid is undergoing drilling tests. One configuration of the downhole replaceable chain drill utilizes synthetic diamond cutters at the pivot point, while a second configuration utilizes these cutters exclusively. This paper describes the design of each bit and presents the results of recent drilling tests. Design and testing philosophy are reviewed and plans for future design revisions and testing are described.
- OSTI ID:
- 6284319
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
422000* -- Engineering-- Mining & Underground Engineering-- (1980-)
CARBIDES
CARBON COMPOUNDS
DATA
DESIGN
DRILL BITS
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FABRICATION
INFORMATION
NUMERICAL DATA
PERFORMANCE
PERFORMANCE TESTING
ROCK DRILLING
TESTING
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS