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The jackup oil rig is a self-contained combination drilling rig and floating barge, fitted with long support legs that can be raised or lowered. The jackup is towed onto location with its legs up and the barge section floating on the water. Upon arrival at the drilling location, the legs are jacked down onto the seafloor and then are jacked further down. This jacking down of the legs has the effect of raising the platform, barge and drilling package. In this manner, the entire barge and drilling structure are slowly raised above the water to a predetermined height above the water, Jackup platforms are used as exploratory drilling platforms and offshore and wind farm service platforms, and they can drill in waters up to 350 feet deep.