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In 2005 alone, the US Produced an estimated 9 million barrels of crude oil every day and imported 13.21 million barrels per day from other countries. This oil gets refined into gas, kerosene, heating oil and other products. To keep up with our consumption, oil corporations must constantly look for new sources of petrol, as well as improve the production of existing wells.

An oil well is a general term for any boring through the Earth's surface built to find and produce petroleum oil hydrocarbons. Generally some natural gas is produced with the oil, and a well built to produce principally or only gas may be termed a gas well.

The term can refer to land-based oil rigs, or a marine-based structure ordinarily called an 'offshore rig'. The term properly refers to the plant that drills the oil well including the rig derrick (which looks like a metal frame tower ). Laypeople also refer to the structure upon which the oil rigs and from that the wells produce as a 'rig', but this is not correct. The correct name for the structure in a sea environment is platform.

In early oil exploration, drilling rigs were semi-permanent in nature frequently being built on site and left in place after the completion of the well. In more up to date times drilling rigs are costly custom built machines that are capable of being moved from well to well. Some light duty drilling rigs are similar in nature to a mobile crane though these are more usually used to drill water wells. Larger land rigs must be broken apart into multiple sections and loads in order to move to a technique which can often take weeks.

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