میان‌دستی

thumb|Petroleum Pipeline System An overview of an oil pipeline system from the wellhead to downstream consumersthumb|Natural Gas Pipeline System An overview of a natural gas pipeline system from the wellhead to the consumerThe oil and gas industry is usually divided into three major components: upstream, midstream and downstream. The midstream sector involves the transportation (by pipeline, rail, barge, oil tanker or truck), storage, and wholesale marketing of crude or refined petroleum products. Pipelines and other transport systems can be used to move crude oil from production sites to refi