Analysis of temperature distribution and performance of polycrystalline diamond compact bits under field drilling conditions

Conference · Sat Sep 01 04:00:00 EDT 1984 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:6073815

Zijsling, O H

Analysis of laboratory tests on full-scale fieldworn polycrystalline diamond compact (PDC) bits showed the frictional heat at the rock/bit interface to be largely generated at the diamond cutting edges of the PDCs. Inspection of the observed wear of the PDCs together with the analysis revealed that the diamond layer attacks the formation at a large negative rake angle and that rock flour accumulates under the cutting edge during drilling, forming a stable buildup edge. The results showed that for effective cooling of the PDCs fluid velocities of at least 50 m/s are required along the diamond surfaces when drilling with oil-based fluids. With water-based drilling fluids, higher velocities should be used to prevent bit balling or boiling of the drilling fluid at the diamond surface of the PDCs.

• Research Organization: Koninklijke/Shell E and P Laboratorium
• OSTI ID: 6073815
• Report Number(s): CONF-8409104-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE13260
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
BENCH-SCALE EXPERIMENTS
CARBON
COOLING
CRYSTALS
DIAMONDS
DRILL BITS
DRILLING EQUIPMENT
DRILLING FLUIDS
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
FLUIDS
FRICTION
INTERFACES
MINERALS
NONMETALS
PERFORMANCE
POLYCRYSTALS
TEMPERATURE DISTRIBUTION
TEMPERATURE EFFECTS
WEAR