Question: A 10 ppg mud is flowing at a steady rate of 160 gal/min down a drillpipe having an internal diameter of 4.33 in. and an

A 10 ppg mud is flowing at a steady rate of 160 gal/min down a drillpipe having an internal diameter of 4.33 in. and an external diameter of 5 in. The diameter of the hole in 10 in.

Calculate:

The average flow velocity in the drillpipe (2 marks)

The average flow velocity in the annulus opposite the drillpipe (2 marks)

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