Oil wells, commonly referred to as "oilers," are structures used to extract crude oil from underground reservoirs. These wells are drilled into the earth's surface to reach oil deposits, which are then pumped to the surface for processing. The extraction process is crucial for producing various petroleum products, including gasoline and diesel fuel. The oil industry relies on a network of oilers, pipelines, and refineries to transport and refine crude oil. Oil rigs are often used in offshore drilling, while onshore oilers are found in various regions around the world. The operation of oilers plays a significant role in the global economy and energy supply.