... ABSTRACT The current research on subsea pipeline damage predominantly utilize theoretical formulations and numerical simulations. While theoretical calculations offer rapid results, they often lack precision; conversely, numerical simulations provide greater accuracy but require more time...

... ABSTRACT A combination of model experiments and numerical simulations was used to study the anti anchor ability of subsea pipeline in sea route areas under rockfill protection. By setting up layered rockfill protection to imitate the actual subsea pipeline rockfill protection plan, anchor drop...

... and transported to Yacheng13-1 platforms via a 115km 20" extra-long subsea pipeline. The processed gas and condensate were transported to Hong Kong and Nanshan onshore termination. Lingshui25-1 gas field realized operation of subsea production system on Lingshui17-2 platform, Yacheng13-1 platform and Nanshan...

... ABSTRACT The Lingshui 25-1 subsea gas field was tied back to the Yacheng 13-1 platform through a single extra-long subsea pipeline, for which frequent pigging is required. To address these issues, a remote pigging strategy was developed, incorporating a subsea automatic pigging manifold...

... approach, incorporating applications of deep learning method known as Physics Informed Neural Networks (PINNs), is proposed as an alternative for pipelay analysis modeling. We explain how to incorporate the static equilibrium of subsea pipeline laying into PINNs, and explore in detail the application...

... ABSTRACT To enhance the transport capacity of subsea pipelines, reduce design redundancy, and achieve accurate operational pressure prediction, a novel hydraulic friction coefficient correction model is proposed. This model integrates field data from in-service subsea oil pipelines...

... and emergency repair engineering of submarine pipelines. INTRODUCTION Subsea pipelines serve as crucial conduits for the transportation of energy resources, including oil and natural gas. In shallow offshore regions, certain subsea pipelines are protected by rock dumping and backfilling to mitigate the risk...

... recognized and cited. An et al. (2015) presented improved lumped models for transient thermal analysis of multilayer composite pipelines with active heating, which is essential for flow assurance design and operating strategies of deepwater subsea pipelines. In parallel, An and Su (2017) focused on transient...

... of Subsea Pipelines by Hooking of Dragging Anchor Jian Zhou, Shiming Yang,Qianshuo Qi,Yanbo Liu* College of Shipbuilding Engineering, Harbin Engineering University, Harbin, China ABSTRACT Currently, research on subsea pipeline damage predominantly focuses on incidents involving falling objects hitting...

... of ships has a significant impact on the damage of submarine pipelines (See Fig. 1). anchor anchor trajectory thickness hall anchor trajectory anchor fluke anchor shank offshore pipeline submarine pipeline experiment subsea pipeline pipeline gravel gravel backfilled offshore pipeline...

... ABSTRACT In this study, we conducted experimental and simulation studies to prevent hydrate plugging in the subsea pipeline of LNG-FPSO. Monte Carlo simulations estimated the availability of the topside system to be 89.3%, with the longest downtime being 50 h. Multiphase flow simulation...

... subsea pipelines repaired with composite materials Xu Jiaa, Lusheng Jiaa,b, You Zongb, Fuheng Houb, Zhihao Gaob, Zuomin Zhangb a CNOOC Research Institute Ltd. b College of Mechanical and Transportation Engineering, China University of Petroleum Beijing Beijing, China ABSTRACT Composite material is widely...

... factor of slugging flow induced fatigue. For the critical span section of the subsea pipeline, slugging flow induced fatigue damage budget of 5% is considered with a safety factor of 20. The safety factor of 20 is selected to be in similar order as the VIV analysis considering the uncertainty in slugging...

... buckling capacity but using 0/90° orientation enhances collapse pressure capacity. These findings promise increased durability for subsea pipelines in challenging deep-sea environments, suggesting potential cost savings and industry advancements. INTRODUCTION Deepwater oil and gas exploration...

... pipeline drag anchor trajectory installation process china government anchor installation trajectory impact response upstream oil & gas offshore pipeline displacement installation global displacement asia government pipeline model cel method anchor model subsea pipeline...

... ABSTRACT During the installation process, drag anchors may impact or hook with subsea pipelines buried in seabed, resulting in damage to the pipelines. The inshore subsea pipeline is often protected by a rockfill protection layer, so the pull-out trajectory of drag anchors in the rockfill...

... assessment subsea pipeline ABSTRACT Subsea pipelines and cables are vital components for transporting of gas and fluid in offshore oil industry and electricity in offshore wind industry. The pipe is exposed to complicate environmental loads induced by wave and current. One of the main challenges...

... mode is designed, in which main design principles are studied including considerations on restart, well killing, self-support days, water content of export in subsea pipeline and pipeline replacement and so on, and also special power managing system, control system and communication system are designed...

... deformations so that the critical fault displacement is smaller. Several design suggestions for offshore pipeline considering seismic faults are proposed. The results can be used to guide the seismic design and buckling prevention research of subsea pipeline crossing seismic faults. upstream oil...

... is reported to be one of the main causes that threaten the safety of subsea pipelines. A great number of experimental and numerical studies have been performed to investigate local scour around subsea pipelines. Oscillatory and steady flows are commonly used to model flow near the sea floor induced...