The Bighorn no. 1-5

Between Oct. 1983 and Aug. 1985, Monsanto Oil Co. drilled a 24,877-ft (7583-m)-deep well on the Madden anticline in Wyoming's Wind River basin to evaluate the unexplored potential below the 17,000-ft (5182-m)-deep Cretaceous Cody formation. Three casing strings from surface and four liners were run, including a record depth and weight 16-in. (40.6-cm) string. The well tested at 20 MMcf/D (566 X 10/sup 3/ m/sup 3//d) with minimal drawdown from the Mississippian Age Madison formation at 23,800 ft (7254 m).