An oil rig is a large structure used to extract oil and natural gas from beneath the Earth's surface. These rigs can be found on land or offshore in oceans and seas. They are equipped with drilling equipment and facilities to process the extracted resources. There are different types of oil rigs, including fixed platforms, floating platforms, and jack-up rigs. Each type is designed for specific environments and depths. The extracted oil is then transported to refineries for processing, contributing to the global energy supply and economy.