There are inevitable multiphase flow problems in the process of subsea oil-gas acquisition and transportation, which two-phase involving gas liquid is given much attention. The performance pipelines equipment systems greatly affected by various patterns. As a result, correctly efficiently identifying pattern pipeline critical for oil industry. In this study, two attention modules, convolutional...

Subsea pipelines buried in the seabed may undergo large lateral displacement under environmental, operational, and accidental loads at different interaction rates hence drainage conditions. The undrained shear strength is commonly used practice to assess pipe-soil assuming a sufficiently high rate. This approach neglects consolidation effects rate-dependent response of soil significantly undere...

The pumping system is modelled as shown in Figure 3. Please note that it is an advantage to limit the size of the model by leaving out components which are not active in the sequences that we will be looking at. This is because all of the elements included in a model are included in the calculations, taking up part of our computer’s capacity. This is also the case for passive components such as...

Festoon links are single span subsea links that require no electrically powered amplifiers. Providing longer reach on these types of links enables cost effective, high bandwidth connectivity to more remote locations. TCM-QPSK is an innovative modulation format that works with the hard FEC generation of line cards to provide 2.0dB of extended reach on festoon links compared to differentially cod...

an experiment featuring waterhammer in viscoelastic pipes is presented in which the effects of pipe-wall viscoelasticity on waterhammer pressures are investigated. a large-scale pipeline apparatus made of polyvinyl chloride (pvc) at deltares, delft, the netherlands, has been used to carry out waterhammer experiments. tests have been conducted in a reservoir-pipeline-valve system consisting of a...

An experiment featuring waterhammer in viscoelastic pipes is presented in which the effects of pipe-wall viscoelasticity on waterhammer pressures are investigated. A large-scale pipeline apparatus made of polyvinyl chloride (PVC) at Deltares, Delft, The Netherlands, has been used to carry out waterhammer experiments. Tests have been conducted in a reservoir-pipeline-valve system consisting of a...

By design, the operation of a large 3MW permanent magnet motor-driven pump system has the potential to improve system efficiency and reliability to lower operator costs. Subsea electrical system design and motor performance must be predictable and validated prior to deployment. Critical elements of this system include successful remote start-up and step up–step down transformers. A number of di...