Pipeline pigs operate on a simple yet efficient principle, utilizing the pressure differential within the pipeline to perform various maintenance tasks. Initially, they are introduced into the pipeline through a pig launcher and are propelled by the force of the flowing product or an external driver such as compressed air or water.

Oil is extracted from the underground to the ground and transported to a large refinery to refine the crude oil into the raw materials and the oil which we need. In the process of transporting crude oil, the main transportation tools are divided into two kinds. One is to transport crude oil by vehicle mounted oil tank truck. In this case, the cost is very high. Generally, crude oil is transported by oil pipeline.