offshore pipelines used for oil and gas transportation are often buried to avoid damage from fishing activities and to provide thermal insulation. thermal expansion and contraction of the pipeline during operation can lead to lateral or upheaval buckling. a safe buried pipeline design must take into account a reliable evaluation of soil uplift resistance and pipe embedment depth. while the cost...

High-concentration viscous paste has a large conveying resistance during transport in high-pressure long-distance pipelines. When the pump reverses, pipeline flows back, which not only causes violent vibration of system, but also reduces efficiency. To study transient flow characteristics and backflow reverse process, we established quasi-two-dimensional model for transportation straight pipe b...

In pipeline-riser systems, pressure fluctuations which result from the formation of large liquid slugs and gas surges due to operational changes or low mass flow rate from production wells and the profile of pipeline-riser systems often lead to trips at the inlet of the separator; and thereby, the problem causes a a loss of the production.In this study, on a sample deep-water oil field off the ...

A CGS is of the most important parts in natural gas transmission pipelines in which the high inlet natural gas (NG) pressure is reduced to much lower value by employing a throttling valve. This pressure drop causes hydrate forming, preventing stable NG flow through the pipeline. To prevent hydrate forming, NG is usually preheated by heaters which burns remarkable amount of NG. In this work, a n...

Abstract High-temperature pressure pipeline is an important medium conveying equipment in industrial production. Due to its high temperature and high-pressure characteristics, it very implement effective in-service detection. This paper focuses on the successful application of X-ray digital imaging detection (DR) technology process leak disposal petrochemical flange welds analyzes advantages DR...