Exercise 10 Cement Flow Regime

# Exercise 10 Cement Flow Regime - MEMO Drilling Lab 10 TO:...

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A graph of shear stress versus shear rate for the H slurry with 0.6% Halad 344 is shown in Figure 1. Graph is +2 pt. H + 0.6% Halad 344 0 20 40 60 80 100 120 140 160 0 100 200 300 400 500 600 Shear Rate (1/sec) Shear Stress (lb/100 sqft) Figure 1 – Shear Rate vs Shear Stress Using the end point of the data the plastic viscosity is 129 cp and the yield point is 4.9 lb/100 sq ft. The students may choose to use the best fit line to the data or even a line that starts at zero, so any value that is close for viscosity and yield point is acceptable. +2 pts The yield point is very close to zero, so the Newtonian Fluid Model is used to approximate the critical velocity and pump rate for this slurry. Critical flow in the annulus is given by:
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## This note was uploaded on 02/13/2012 for the course PGE 430 taught by Professor Chenevert during the Spring '06 term at University of Texas at Austin.

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Exercise 10 Cement Flow Regime - MEMO Drilling Lab 10 TO:...

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