The Jackson Barnett No. 11 Oil Well was the most productive oil well in the Cushing Oil Field of northeastern Oklahoma, to the south of Drumright. The well was drilled in 1916 in the Shamrock Dome section of the Cushing field by the Gypsy Oil Company, striking oil on February 17. The well was on the land of Jackson Barnett, a Creek landowner who subsequently became known as the "world's richest Indian."