A special tool used downhole for shooting holes in the well's casing opposite the producting formation. The gun, a steel tube of various lengths, has steel projectiles placed at intervals over its outer circumference, perpendicular to the gun's long axis. When lowered into the well's casing on a wire line opposite the formation to be produced, the gun is fired electrically, shooting numerous holes in the casing which permit the oil or gas to flow into the casing.
