The bit cunently in use has three 12/32 in nozzles The driller has recorded that when 10 nRg mud is pumped in the rate o

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The bit cunently in use has three 12/32 in nozzles The driller has recorded that when 10 nRg mud is pumped in the rate of 500 gom, a pump pressure of 3000psi is observed, and when the pump rate is slowed to a rate of 250 pm, a pump pressure of 800 psi is observed. The total depth of the well is 10000ft, and minimum annular velocity is 120ftimin The well plan is called for the following conditions cp Mud Pump 3000 psi maximum surface pressure, 1000 hp maximum input (Assuming 100% efficiency) Drill string 4.5 in OD, 3 2826 in ID drill pipe, and 600ftof 75n OD, 2.75 in ID drill collars Hole size: 9 857 washed out to 10.05