Question: Compute the mud density in the annulus for the cut- ting transport ratios of 90, 50, and 5% if the mud density entering the

Compute the mud density in the annulus for the cut- ting transport

Compute the mud density in the annulus for the cut- ting transport ratios of 90, 50, and 5% if the mud density entering the well is 9 lbm/gal and the drill- ing rate is 100 ft/hr. Assume a flow rate of 600 gal/min, a bit size of 9.875 in., and a rock bulk density of 2.2 g/cm. Answers: 9.11, 9.20, 10.7 Ibm/gal.

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