Effects of hydraulic parameter cleaning variations on rate of penetration of soft formation insert bits
Conference
·
· Soc. Pet. Eng. AIME, Pap.; (United States)
OSTI ID:5445872
Effects of hydraulic cleaning parameter variations on rate of penetration response of 7 7/8 inch diameter soft formation insert bits have been measured in laboratory drilling tests. Tests were conducted in Mancos Shale rock samples at 700 psi and 4000 psi simulated overbalance pressure conditions using a 9.1 pound per gallon bentonite-barite water base drilling fluid. Bit hydraulic horsepower was varied from 0.72 to 9.5 HHP/in/sup 2/ using two or three nozzles in sizes ranging from 9/32 to 14/32 inches in diameter. Some improvements in ROP at constant bit hydraulic horsepower and impact force levels were obtained with two nozzle configurations vs. three nozzle configurations, but improvements were not consistently out of the range of normal test to test variations. Reduction in drilling costs due to the measured response of ROP to improved hydraulic cleaning is compared to increased operating costs required to provide additional hydraulics. Results indicate that bit hydraulic horsepower levels in excess of popular rules of thumb are cost effective in slow drilling due to high overbalance pressure.
- Research Organization:
- Reed Rock Bit Co.
- OSTI ID:
- 5445872
- Report Number(s):
- CONF-820927-
- Conference Information:
- Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE11058
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
BARITE
BARIUM COMPOUNDS
BARIUM SULFATES
BENTONITE
CLAYS
COST
CUTTINGS REMOVAL
DIMENSIONS
DISPERSIONS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUID MECHANICS
FLUIDS
HYDRAULICS
MECHANICS
MINERALS
MIXTURES
NOZZLES
OPERATING COST
OXYGEN COMPOUNDS
PARAMETRIC ANALYSIS
PERFORMANCE TESTING
PRESSURE DEPENDENCE
REMOVAL
RESERVOIR ROCK
ROCK DRILLING
ROCKS
SEDIMENTARY ROCKS
SHALES
SIMULATION
SOLUTIONS
STEADY-STATE CONDITIONS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
TESTING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
BARITE
BARIUM COMPOUNDS
BARIUM SULFATES
BENTONITE
CLAYS
COST
CUTTINGS REMOVAL
DIMENSIONS
DISPERSIONS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUID MECHANICS
FLUIDS
HYDRAULICS
MECHANICS
MINERALS
MIXTURES
NOZZLES
OPERATING COST
OXYGEN COMPOUNDS
PARAMETRIC ANALYSIS
PERFORMANCE TESTING
PRESSURE DEPENDENCE
REMOVAL
RESERVOIR ROCK
ROCK DRILLING
ROCKS
SEDIMENTARY ROCKS
SHALES
SIMULATION
SOLUTIONS
STEADY-STATE CONDITIONS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
TESTING