Recent developments in polycrystalline diamond-drill-bit design
Development of design criteria for polycrystalline diamond compact (PDC) drill bits for use in severe environments (hard or fractured formations, hot and/or deep wells) is continuing. This effort consists of both analytical and experimental analyses. The experimental program includes single point tests of cutters, laboratory tests of full scale bits, and field tests of these designs. The results of laboratory tests at simulated downhole conditions utilizing new and worn bits are presented. Drilling at simulated downhole pressures was conducted in Mancos Shale and Carthage Marble. Comparisons are made between PDC bits and roller cone bits in drilling with borehole pressures up to 5000 psi (34.5 PMa) with oil and water based muds. The PDC bits drilled at rates up to 5 times as fast as roller bits in the shale. In the first field test, drilling rates approximately twice those achieved with conventional bits were achieved with a PDC bit. A second test demonstrated the value of these bits in correcting deviation and reaming.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6564056
- Report Number(s):
- SAND-79-1592C; CONF-800204-11
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
150901* -- Geothermal Engineering-- Drilling Technology & Well Hardware
BOREHOLES
CARBON
CAVITIES
DESIGN
DIAMONDS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
ELEMENTS
EQUIPMENT
FIELD TESTS
FLUIDS
FRACTURED RESERVOIRS
GEOTHERMAL WELLS
Geothermal Legacy
MARBLE
METAMORPHIC ROCKS
MINERALS
NONMETALS
RESERVOIR PRESSURE
ROCKS
SEDIMENTARY ROCKS
SHALES
TESTING
WELL DRILLING
WELL PRESSURE
WELLS