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ISSN: 2667-1433

Iceberg-seabed interaction evaluation in clay seabed using tree-based machine learning algorithms

In Arctic offshore regions, the oil and gas hydrocarbons are transferred to the onshore basins through the subsea pipelines. However, the operational integrity of the subsea pipeline may be at risk...

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Review and analysis of pipeline leak detection methods

A pipeline burst or rupture causing a leak may significantly impact the environment and the reputation of the company operating the pipeline. In recent years, oil and gas pipelines are expected to be...

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Experimental and numerical study on the flow characteristics of slug flow in a horizontal elbow

•Phase distribution of gas-liquid two-phase slug flow at the elbow was clarified.•Effects of elbow on flow characteristics at slug flow were analyzed.•A CFD simulation method for slug flow at the elbow...

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Drag reduction in single-phase crude oil flow: A mini-review

It is well recognized that a major issue for fluid flows in many industrial pipe systems, including the transportation of crude oil, is the high energy consumption in the pipeline system brought on...

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Investigation on leakage detection and localization in gas-liquid stratified flow pipelines based on acoustic method

Leakage detection technology is of vital importance to the safe operation and flow insurance of multiphase flow pipelines. This paper for the first time applies acoustic based leakage detection method...

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Artificial neural network models of burst strength for thin-wall pipelines

Burst strength is critical to pipeline design, operation, and integrity management. The Barlow formula with the ultimate tensile stress (UTS) was often used to estimate burst strength of line pipes....

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A New Calculation Method and Model of Hydrate Slurry Flow of The Multiphase Pipeline in Deep Water Gas Field

The transportation environment of multiphase pipelines in deepwater gas fields is likely to cause the problem of hydrate flow safety. Aiming at the gas-liquid-solid three-phase flow problem containing...

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Prediction model of critical liquid-carrying gas velocity for high gas-to-liquid ratio gathering pipelines

As the pressure and temperature of natural gas pipelines decreases during operation, water and condensate accumulates form in the low areas of the pipelines, affecting the operational efficiency of...

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Plastic collapse analysis in multiaxially loaded defective pipe specimens at different temperatures

A comprehensive numerical investigation is carried out using a newly developed constitutive model to describe failure at low temperatures in multiaxially loaded cracked pipes made of 316L stainless...

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Data Augmentation Using conditional Generative Adversarial Network (cGAN): Application for Prediction of Corrosion Pit Depth and Testing Using Neural Network

Machine learning (ML) based algorithms, due to their ability to model nonlinear and complex relationship, have been used in predicting corrosion pit depth in oil and gas pipelines. Class imbalance and...

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Assessing damaged pipelines transporting hydrogen

There is worldwide interest in transporting hydrogen using both new pipelines and pipelines converted from natural gas service. Laboratory tests investigating the effect of hydrogen on the mechanical...

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High energy X-ray diffraction and small-angle scattering measurements of hydrogen fatigue damage in AISI 4130 steel

Accurate lifetime predictions are critical for repurposing existing pipelines for hydrogen transmission as well as for developing novel steels which are minimally susceptible to lifetime degradation...

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Application of line pipe and hot induction bends in hydrogen gas

For the upcoming hydrogen economy, transport pipelines for hydrogen gas and gas mixtures of hydrogen and natural gas are one of the important components. For the application of steel in hydrogen gas...

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Significance of separations occurring in mechanical testing of thermomechanical rolled pipeline steels

In this study, the origin of separations is investigated in modern high strength pipeline steels. In-depth microstructure characterization and property correlation is used to demonstrate that preferred...

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Prediction of properties on large diameter welded pipe: case study on 32″ × 16 mm X65 HSAW pipe

Large diameter welded pipes are amongst the most cost-effective transportation means for oil and gas. The production of those pipes involves different cold forming steps, as a result of which the mechanical...

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Modeling the effect of backfill on dynamic fracture propagation in steel pipelines

In this paper, dynamic ductile fracture propagation simulations were conducted to study the use of smoothed particle hydrodynamics (SPH) for modeling the effects of backfill in pipeline burst simulations. ...

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Influence of stress states on cleavage fracture in X70 pipeline steels

Stress state is a primary factor controlling the ductile fracture behavior of steels, which is typically represented as the combination of the stress triaxiality and Lode angle parameter. The cleavage...

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Review of minimum requirements and development of guidance for weld spacing

Follow-on work to a recently completed joint industry project pertaining to hot tap branch connections included the development of guidance on minimum spacing between various combinations of adjacent...

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Stochastic filter-based fatigue crack growth prediction for pipelines considering unknown model parameters and measurement uncertainty

In this study a methodology is developed and implemented in Python for fatigue crack growth prediction in pipelines, by leveraging measurement data and fatigue growth model predictions. Specifically,...

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Identifying two-point leakages in parallel pipelines based on flow parameter analysis

Parallel pipelines are widely used to transport energy resources. Leakages usually can occur in pipelines due to aging, corrosion, metal failure, etc. When an accident happened, not only the energy...

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Resilience assessment of a subsea pipeline using dynamic Bayesian network

Microbiologically influenced corrosion (MIC) is a serious concern and plays a significant role in the marine and subsea industry’s infrastructure failure. A probabilistic methodology is introduced in...

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A methodology for time-varying resilience quantification of an offshore natural gas pipeline

Many resilience definitions and metrics have been presented across various disciplines in recent times. However, from a design and operations perspective, a limited effort is focused on quantifying...

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Uncertainties in internal pressure of oil transmission pipelines and implications for the reliability analysis

This study addresses a significant knowledge gap in the reliability-based fitnessfor-service assessment of pipelines, namely the statistical information of the internal operating pressure. To this end,...

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A comparative study of the effect of the soil constitutive model on the seismic response of buried concrete pipes

No attention has been given in previous studies to understand the influence of the sophistication of the soil constitutive model on the response of buried concrete pipes subjected to transverse seismic...

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Leakage of gasoil from side cut piping in crude distillation unit of a petroleum refinery

•SS316L elbow has been failed after 3 years of gasoil service in side cut piping.•Material defect existed in the elbow due to poor pre-commissioning inspection.•Middle distillate gasoil produced from...

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