for two nozzles:ī) For hydraulic horsepower: Nozzles = V 0. So: 1 jet = 10/32nds 2 jets = 11/32nds b) For hydraulic horsepower: 0.03 x 3 = 0.09 rounded to 0 so: 3 jets = 9/32 nd in. The fraction times 3 will determine how many nozzles should be larger than that calculated.Ī) For impact force: 0.76 x 3 = 2.28 rounded to 2 NOTE: Usually the nozzle size will have a decimal fraction. 26632 x 32ī) For hydraulic horsepower: Nozzles = V 0.1877 x 32 hydraulics, hole cleaning, well control design, advanced drilling methods. in.ī) For hydraulic horsepower: Nozzles area, sq. Advanced Well and Drilling Engineering course provides a detailed knowledge of. Pb = 1489 psi b) For hydraulic horsepower: Pb = 3000 psi - 1010 psi Pb = 1990 psi For impact force:Pb = 3000 psi - 1511 psi.Determine pressure losses at the bit (Pb):.97 + 2 Popt = 1511 psi b) For hydraulic horsepower: Popt = 1 x 3000.Determine optimum pressure losses, psi (Popt):.Total pressure losses except bit nozzle pressure loss (Pc), psi:Ĥ. Pump rate 2 = 275 gpm Pump pressure 2 = 1300 psiģ. Select the proper jet sizes for impact force and hydraulic horsepower for two jets and three jets:ĭATA: Mud weight = 13.0 ppg Maximum surface pressure = 3000 psi Pump rate 1 = 420 gpm Pump pressure 1 = 3000 psi for two nozzles:Įxample: Optimise bit hydraulics on a well with the following: To determine nozzle area, sq in.: Nozzle area, sq in.To determine pressure at the bit (Pb): Pb = Pmax - Popt.Pmax b) For hydraulic horsepower: Qopt, gpm = (Popt )1 - M x Q1 For impact force:Qopt, gpm = (Popt )1 - M x Q1.Determine slope of line M:M = log (Pcr- Pc?)ī) For hydraulic horsepower: Popt = 1 x Pmax.Total pressure losses except bit nozzle pressure loss, psi (Pc): Pci & Pc2 = circulating pressure, psi - bit nozzle pressure Loss.Bit nozzle pressure loss, psi (Pb): Pb = gpm2 x MW, ppg 10858 x nozzle area, sq in.2 These series of formulas will determine the correct jet sizes when optimising for jet impact or hydraulic horsepower and optimum flow rate for two or three nozzles.ġ.
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