The use of single-cutter data in the analysis of PDC bit designs

Conference · Tue Dec 31 23:00:00 EST 1985

OSTI ID:7159699

Glowka, D A

A method is developed for predicting cutter forces, temperatures, and wear on PDC bits as well as integrated bit performance parameters such as weight-on-bit (WOB), drilling torque, and bit imbalance. A computer code called PDCWEAR has been developed to make this method available as a tool for general bit design. The method uses single-cutter data to provide a measure of rock drillability and employs theoretical considerations to account for interaction among closely spaced cutters on the bit. Experimental data are presented to establish the effects of cutter size and wearflat area on the forces that develop during rock cutting. Waterjet assistance is shown to significantly reduce cutting forces, thereby extending bit life and reducing WOB and torque requirements in hard rock. The effects of bit profile, cutter placement density, bit rotary speed, and wear mode on bit life and drilling performance are investigated.

• Research Organization: Sandia National Labs., Albuquerque, NM
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7159699
• Report Number(s): CONF-861080-
• Country of Publication: United States
• Language: English

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CARBON
COMPUTER CODES
COMPUTER-AIDED DESIGN
CRYSTALS
DATA ANALYSIS
DENSITY
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
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ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
MECHANICAL PROPERTIES
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MINERALS
NATURAL GAS WELLS
NONMETALS
OIL WELLS
P CODES
PERFORMANCE
PHYSICAL PROPERTIES
PLANNING
POLYCRYSTALS
ROCK DRILLING
ROCK MECHANICS
ROTARY DRILLING
ROTARY DRILLS
SERVICE LIFE
TEMPERATURE MEASUREMENT
TORQUE
WEAR
WEIGHT
WELL DRILLING
WELLS