The lost circulation alarm is sounded by the well monitoring equipment, and the driller notices that the hook load slowly increases. A total of 4,000 lbm of hook load was gained before the hook load again stabilized. Calculate the depth of the fluid level in the well. The well contained 14.5-lbm/gal mud, and the drillstring consisted of 9,400 ft of 5-in. drillpipe and 600 ft of 7-in. drill collars. The drillpipe weighs 100 lbm/ft in air. Casing having an internal diameter of 12.347 in. is set at 4,000 ft. The open hole having a diameter of 9,875 in., extends from the casing seat to the total well depth of 1,000 ft. Steel has a density of 490 lbm/ cu ft.