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96 Part I Liquid Drilling Systems

1500

Impact Force (lbf) 1000

500

0
0 200 400 600 800
Flow Rate (gpm)
Figure 4.4 Jet impact force versus flow rate profile in the circulating system.

ECD Fracture
11.5

11.0
ECD (ppg)

10.5

10.0
200 300 400 500 600 700 800
Flow Rate (gpm)
Figure 4.5 ECD at 11,500 (ft) versus flow rate profile in the circulating system.

kick nor loss of circulation is expected at mud flow rate values lower
than 560 gpm.
The calculated pump pressure profile is plotted in Figure 4.6. It indi-
cates that the maximum allowable flow rate is 300 gpm for the pump in
order to maintain the pump pressure below the maximum allowable
value of 3,000 psi. The calculated pressure component profile is presented