Question: A drill string consisting of 5-in. drill pipe (L = 10,500 ft, ID = 4.276-in., wt. 19.5 lb/ft) and 8-in. drill collar (L =

A drill string consisting of 5-in. drill pipe (L = 10,500 ft, ID = 4.276-in., wt. 19.5 lb/ft) and 8-in. drill collar (L = 950 ft, ID = 23/4-in., Wt. 150 lb/ft) is used to drill 9.875-in. well. Find mud level in wellbore when drill string is pulled out (1273 ft, 10177 ft) = =

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