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An oil well is a general term for any boring through the Earth’s surface designed to find and produce petroleum oil hydrocarbons. Drilling at Titusville, Pennsylvania, “Colonel” Edwin Drake strikes oil at a depth of 69.5 feet (21.2 m). Prior to that, oil, which had been used mostly as a lubricant and lamp fuel, had been obtained only at places where it seeped from the ground. With a boom about to begin, western Pennsylvania would witness the world’s first successful oil drill.