Pump Rate / Pressure Drop / Friction Loss

[Digger3058]

I am testing a well with 2 7/8" 6.5# tubing that will eventually be completed with either 4 1/2" 11.6# or 7.00" 26.0# K-55. The well contains 10# Saturated Brine. With a packer set at 2700' in a vertical well and a surface pressure of 1,000 psi @ 4 bpm, what pressure drop due to friction loss can I expect with the varying tubing sizes? I seem to have lost all of my fluid dynamics reference manuals and feel a bit silly having to ask this question..... I appreciate any help and I can tell from the threads I've reviewed so far that I am definitely asking this question in the correct forum.

Thanks and best regards,

 

[dcasto]

Quicky:
Delta P per 100 feet = .0216 * f * density * Rate ^2 / dia^5

f is friction factor based on flow type, guess .03, density is about 75 lb/cf Q = 168 gpm diameter is 2.5 in,

The numbers come out 2.5" = 221 psi for 2700 ft 15.6 psi for 4" and 1.86 psi for 7"