In order to increase the economic benefit of oil and gas pipeline, it is necessary to analyze the situation of oil and gas pipeline of our country. There is total length of 17 882 km pipeline in our country till now. The utilization rate of the pipeline transportation capacity is less than 60% and efficiency of oil pumps is as much as 60%-70%, effciency of heaters is at the level of 65%-75%. This indicates that labour productivity in our country is lower than those in developed countries. Although the advan...