-, Nozzle size analysis to determine the next bit's total jet area was carried out in a well using maximum bit hydraulic horsepower model. The mud currently being used in the circulation system has a density of 9.6lbm/gal. A slope of straight line (m) on the log-log plot of flow rate vs. pressure was calculated to be 1.6 , and the straight-line crosses at Interval- 2 with a flow rate of 530gal/min. The mud pump provides 3,400psig of maximum discharge pressure to circulation system. Assume that the discharge coefficient is 1 . a) Determine the optimum hydraulics occurs in Interval-2; i.e., optimum parasitic pressure losses (Pp), optimum flow rate ( qopt), optimum pressure drop at the bit (Pb). b) Determine the proper total nozzle area (At)opt. c) Determine the probable optimum nozzle sizes if bit has three nozzles