QUESTION 6 A drillstring will be composed of DC 7" OD + HWDP 5" OD + DP 5" OD to drill a vertical well to a total depth of 16,000 ft. Given data: DC weight HWDP weight DP weight DC length HWDP length DP tension capacity (table) Mud weight | 120 lbf/ft 50 lbf/ft 20 lbf/ft 720 ft 450 ft 600,000 lbf 10 lb/gal Compute the safety factor in use at the final depth.

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Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?