Abstract: Due to changes in the receiving conditions of downstream production facilities,the submarine gas pipeline needs to achieve reverse transportation of crude oil and water. Under this working condition,it is also necessary to complete the intelligent internal inspection work of the two submarine pipelines under the jurisdiction of the facilities. Through process optimization design,different power sources and media were innovatively selected to eliminate the risk of stuck balls,the impact of gas supply from the power grid turbine and the disadvantage of lacking power sources,and the intelligent internal inspection work of the two submarine pipelines was completed smoothly and orderly during reverse transportation.

Key words: submarine pipeline, reverse transportation, intelligent internal inspection, optimization design, power source