Question 3. (30 points) Using Bingham plastic model calculate the swab pressure only for drillpipe in a 7.875-in. Hole below a 15000-ft drillstring composed of 14300 ft of 4.5-in. Drillpipe (3.826-in. ID), 700 ft of 6.25-in. Drill collars (2.75-in ID), and a bit containing three 11/32-in. Nozzles (0.2784 sq in.). The drillstring is moving through a 10-1bm/gal drilling fluid (dial reading @600= 130, dial reading @300 rpm=70) at a maximum rate of 4.0 ft/s.