Question: In a given well, with all else held constant, penetration rate was found to increase from 1 0 1 5 f t h r when

In a given well, with all else held constant, penetration rate was found to increase from 1015fthr when rpm was increased from 60 to 90rpm.
Calculate the rotary speed exponent.
In a given well, with all else held constant, penetration rate

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