Dome-shaped PDC cutters drill harder rock effectively
- Smith International Inc., Houston, TX (United States)
This paper reports that rock mechanics and sonic travel time log data indicate that bits with convex-shaped polycrystalline diamond compact (PDC) cutters can drill harder rock formations than comparable bits with flat PDC cutters. The Dome-shaped cutters have drilled carbonate formations with sonic travel times as small as 50 [mu]sec/ft, compared to the standard cutoff of 75 [mu]sec/ft for flat PCD cutters. Recent field data from slim hole wells drilled in the Permian basin have shown successful applications of the 3/8-in. Dome cutter in the Grayburg dolomite with its sonic travel times as low as 50-55 [mu]sec/ft and compressive strengths significantly greater than the standard operating range for PDC bit applications. These field data indicate that the Dome cutters can successfully drill hard rock. The convex cutter shape as good impact resistance, cuttings removal, heat dissipation, and wear resistance.
- OSTI ID:
- 7009709
- Journal Information:
- Oil and Gas Journal; (United States), Journal Name: Oil and Gas Journal; (United States) Vol. 90:50; ISSN 0030-1388; ISSN OIGJAV
- Country of Publication:
- United States
- Language:
- English
Similar Records
Bits with diamond-coated inserts reduce gauge problems
Use of single-cutter data in the analysis of PDC bit designs
Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
CARBON
CRYSTALS
CUTTING TOOLS
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
MECHANICS
MINERALS
NONMETALS
OIL WELLS
PERMIAN BASIN
POLYCRYSTALS
ROCK MECHANICS
SHAPE
TOOLS
WELL DRILLING
WELL LOGGING
WELLS