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Keywords: pipeline
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Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1215
... ABSTRACT The calamities of oil leaking under water in ocean environments have motivated a number of studies on the theoretical mechanisms of oil jetting, oil leaking and diffusion phenomena from subsea oil pipelines. This paper presents results in terms of theoretical and computational fluid...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2199
... ABSTRACT Scouring, due to the interaction of fluid, pipeline and material of soil, is a complex phenomenon, numerous effective parameters are involved on the scouring phenomenon below the pipelines. In order to predict scour depth accurately, investigators have tried to predict scour depth by...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2148
... ABSTRACT As a premise research, performance and optimization strategy for conveying system of hydraulic dredgers is studied. Calculation method of conveying system performance is formed by combing pump performance and pipeline resistance formulas according to available researches and...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2196
... ABSTRACT Three surveys of an 8km long subsea pipeline laid on a soft clay seabed were performed using side scan sonar profiler. The free span characteristics over the field surveys were examined and compared with the conventional free span design criteria. The comparison results indicate some...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2168
... ABSTRACT The J-lay and S-lay are two common methods for SCR (steel catenary riser) and pipeline installation. When using the S-lay installation method, onboard welded pipe joints leave the vessel horizontally and are guided to the seabed over a stinger. The pipe is lowered using tensioners...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2200
... ABSTRACT Wave-induced scour plays a key role in the stability analysis of coastal structures, submarine pipelines or cables. There is a rich literature in current-induced scour, but more research is needed to understand the characteristics of wave-induced scour and the mechanisms that are...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1321
.... subsea system platform water depth enhanced recovery fabrication cpt foundation pile waterflooding angola pipeline otc upstream oil & gas template module jacket platform gulf offshore technology conference compliant tower platform baldpate compliant tower installation compliant...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2198
... ABSTRACT The submarine pipeline is an important transport tool in the offshore oil and gas field. Many pipelines are laid on the seabed directly and suffer hydrodynamic forces. The sandy seabed is also scoured under the pipeline in the marine environment. In order to investigate the local scour...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2164
... ABSTRACT A pipeline inspection gauge (PIG) has been a versatile tool for the maintenance of a long pipeline. However, speed excursions in a low-pressure gas pipeline may damage the pig or the pipe. Due to the gas compressibility, significant speed excursions may occur during the start of the...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1334
... equipment and subsea pipeline. In order to reduce the CO 2 partial pressure then to reduce the subsea pipeline cost based on material selection, a new process treatment system is designed. In which, fluids from the wells of high CO 2 content and low CO 2 content are treated respectively in different...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2191
... ABSTRACT Multiphase transportation technology is widely used in subsea pipelines, while some necessary flow characteristics of the multiphase flow are difficult to obtain by traditional methods. In this study, the emulsified water fraction and equivalent viscosity of oil-water mixture under...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2152
... ABSTRACT To overcome difficulties that Structural Health Monitoring Devices (SHMDs) are sometimes isolated without power supply, this study proposed a real-time SHMD for pipelines using a bellows-type of flexible piezoelectric device (FPED) as a vibration energy harvester to obtain a piezo...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2145
... ABSTRACT Ultra-deepwater hydrocarbon pipelines face a number of design challenges in the form of demanding geotechnical characteristics of the selected route, extreme slope, construction loads arising from suspended catenary and loads introduced during conventional hydrotesting of the installed...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3225
... investigate the effect of the RC on sand slurry transported by horizontal pipelines. Six groups of simulations were conducted with particle sizes ranging from 0.29 to 0.55 mm, pipe diameters ranging from 53.2 to 263 mm and efflux solid volume concentrations ranging from 15% to 34%. In each group, different...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2154
... the pipeline increase and reach the target value in 12 hours. Nearly two years passed, the apparatus and the heating and insulation effect in the test pipeline section is keeping in good condition. The results have verified the functional feasibility and physical performance reliability of the...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-374
... ABSTRACT Submarine pipelines are key infrastructures in offshore oil and gas engineering. They are widely used for transportation of the oil and gas from production wells to onshore facilities. With the development of the port engineering and the exploitation of ocean oil and gas resources...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-482
... ABSTRACT With the improvement of welding technology, applications of electric resistance welded (ERW) pipes have been extended to offshore pipelines. A main design factor for offshore pipelines is resistance to external pressure. The structural performance is affected by influence variables...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-538
... lower end interaction mechanical behavior sheet-pile extraction model experiment right pipe deflection ground density deformation experiment flexible pipe left pipe pipe sheet pile extraction extraction twin pipe pipeline pile extraction model pipe Model Experiments on...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-413
... ABSTRACT A series of wave flume experiments are conducted to investigate the wave-induced pore pressure around a trenched pipeline in a silty seabed. The pipeline is half or full buried with three kinds of backfill sand ( d 50 =0.15mm, 0.3mm, 0.5mm), each is coarser than seabed soil ( d 50...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-574
... ABSTRACT Offshore pipelines have been commonly used in the transportation of ma-rine energy resources that is one of the main concerns of offshore oil and gas industry. In general, seabed stability around a pipeline and its resultant damage of the pipeline is one of the critical factors to be...

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