Use of single-cutter data in the analysis of PDC bit designs

Conference · Fri Oct 10 04:00:00 EDT 1986

OSTI ID:5481828

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. 21 refs., 34 figs., 4 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5481828
• Report Number(s): SAND-86-0342C; CONF-861080-3; ON: DE86014297
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150901* -- Geothermal Engineering-- Drilling Technology & Well Hardware
CARBON
COMPUTER CODES
DATA
DESIGN
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
GEOTHERMAL WELLS
Geothermal Legacy
HYDROGEN COMPOUNDS
INFORMATION
JETS
MINERALS
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
P CODES
PERFORMANCE
ROCK DRILLING
TEMPERATURE EFFECTS
TORQUE
WATER
WEAR
WELL DRILLING
WELLS