Oil pumping is the process of extracting crude oil from underground reservoirs. This is typically done using a mechanical device called a pumpjack, which uses a system of rods and gears to bring oil to the surface. The oil is then collected and transported for refining. Once extracted, the crude oil undergoes refining to produce various petroleum products, such as gasoline and diesel. The oil pumping process is crucial for meeting global energy demands and is often conducted in oil fields located in regions rich in petroleum resources.