In: Mechanical Engineering
4-) Given the following data:
Drilling Fluid Density : 12 ppg
Well Depth: 10,000 ft.
Drill Bit Nozzle Sizes: 13-13-13
Pump Horsepower: 1800
Pump Volumetric Efficiency: 80%
Maximum Pump Pressure: 4,500 psi
Minimum Flow Rate: 350 gpm
Parasitic pressure losses of 2,173 psi and 1,388 psi are anticipated while circulating mud at flow rates 500 gpm and 390 gpm respectively.
a-) (10 points) Determine the parasitic pressure losses when the bit hydraulic horsepower is maximum.
b-) ( 5 points) Determine the optimum flow rate when the bit hydraulic horsepower is maximum.
c-) (5 points) Determine the pressure drop across bit nozzles when the bit hydraulic horsepower is maximum.
d-) (5 points) Determine the optimum sizes of three nozzles to be used for the next bit run, using the maximum bit hydraulic horsepower criteria.