Confidence interval estimation of mixed oil length with conditional diffusion models
Available online 3 October 2025
Accurately estimating the mixed oil length plays a big role in the economic benefit for oil pipeline network. While various proposed methods have tried to predict the mixed oil length, none of them...
Research progress on dynamic crack propagation and crack arrest models of supercritical and dense-phase CO2 pipelines
September 2025
In the past decade, research on the propagation and arrest of CO2 pipeline fractures has achieved some results. This paper comprehensively reviews and evaluates the full-scale burst test, arrest control...
Benzylamine as volatile corrosion inhibitor for top-of-the-line corrosion in water-hydrocarbon co-condensation environment
September 2025
Volatile corrosion inhibitor (VCI) injection is a promising method employed to mitigate top-of-the-line corrosion (TLC) in wet gas pipelines. Amine is the most common type of VCI employed for TLC mitigation,...
Experimental and mechanism study on the synergistic influence of asphaltene and pressure on the flow and rheological characteristics of waxy oil
September 2025
In underground reservoirs and offshore oilfields, the production and transportation of waxy oil inevitably involve pressure and asphaltene environment. However, the effect of asphaltene on the flow...
Enhancing pipeline system resilience: a reliability-centric approach
September 2025
Pipelines are the most widely used system for transporting liquid and gaseous energy materials, but throughout their lifespan, they are exposed to various detrimental factors, such as corrosion and...
Mechanical behavior of pipeline steel after strain aging – Part I: Experiment
September 2025
•After quenching and tempering Lüders strain is twice than after normalization.•True uniform strain and strain hardening exponent proportionally decrease after strain aging.•Changes in Lüders strain...
Calculation for critical gas velocity of liquid accumulation in inclined pipelines: A method based on physics-informed neural network
September 2025
Liquid accumulation in gas pipelines will reduce transportation efficiency, increase corrosion rates, and induce severe slug flow. Calculation for critical gas velocity vcg of liquid accumulation in...
A review of computer vision applications for asset inspection in the oil and gas industry
September 2025
This review explores the current application of computer vision (CV) technologies in the inspection of pipelines within the oil and gas industry, highlighting the methodologies, challenges, and advancements...
CRA clad pipes: Do their benefits justify sole selection?
September 2025
This article presents a case study of a gas leak at a girth weld on a subsea spool. The leak occurred 14 days after the pipeline’s start-up. The pipeline in question was a 36-inch corrosion-resistant...
An algorithm for third-party intrusion action detection in oil and gas pipelines based on fine-grained feature enhancement
September 2025
The extensive distribution of oil and gas pipeline networks across China results in frequent third-party intrusions in high-consequence areas, significantly increasing the risk of pipeline failures...
Reliability analysis of gas pipelines considering spatial and temporal corrosion variability
September 2025
The accelerating deterioration rate, notably due to corrosion in buried gas pipelines, has prompted the development of a systematic methodology for assessing structural integrity. This study introduces...
Experimental study on overpressure and flame characteristics of hydrogen-methane mixture
September 2025
In order to evaluate the consequences of hydrogen-methane mixture explosion accidents in open space and confined space, large-scale (8 m3) open space and confined space (55 m3) hydrogen-methane mixture...
Research on multi-objective optimal route selection method for natural gas transmission pipeline
September 2025
By the end of 2022, the nation’s natural gas pipeline network had reached 12.0 million kilometers, with projections suggesting an expansion to approximately 163,000 km by 2025. This rapid growth, coupled...
A mechanistic model for flow accelerated corrosion prediction of a 90° carbon steel elbow in CO2 environments
September 2025
A mechanistic model for the prediction of CO2 flow accelerated corrosion (FAC) at a 90° carbon steel elbow is developed. Homogenous chemical reactions, electrochemical reactions at the metal/solution...
A Simplified Predictive Model of Thermal Cycling on Initiation of Stress Corrosion Cracking
Available online 29 September 2025
This paper develops a simplified predictive model to investigate the role of thermal cycling in the evolution of a corrosive environment for the initiation of stress corrosion cracking (SCC) on the...
Multi-Priors Tensor Completion for Highly Under-sampled Magnetic Flux Leakage Signal Reconstruction
Available online 29 September 2025
Magnetic flux leakage (MFL) detection has been extensively employed in the safety maintenance of oil and gas pipelines. However, MFL signals are frequently rendered incomplete owing to missing entries...
Study on phase change characteristics of water hammer in LNG liquid pipeline
Available online 29 September 2025
•A one-dimensional flow model based on phase transition is proposed.•The water hammer of LNG pipeline under different initial conditions is analyzed.•The water hammer cavitation under phase change is...
Numerical analysis of mechanical behavior of casing pipe during the process of ramming
Available online 27 September 2025
Horizontal directional drilling (HDD) is an efficient, non-intrusive technique for construction projects, such as pipeline installations across rivers, as it minimizes surface and environmental disruptions...
Fuzzy DEMATEL-Based Risk Assessment Framework for Natural Gas Pipeline Shutdown Operations
Available online 22 September 2025
Shutting natural gas pipelines is a controlled process designed to safely halt gas flow for maintenance, inspections, and repairs. This process involves various technical, human, and emergency-related...
Effect of oxygen and nitrogen on hydrogen adsorption and permeation processes
Available online 14 September 2025
•Dissolved gas variations negligibly affect Deff during hydrogen charging.•High H surface coverage and slow Tafel reaction rate occurred in N2 condition.•N and O atoms shown lower adsorption energies...
Hydraulic Transient Analysis in Low Gas-Liquid Ratio Pipelines Under Valve Closure Conditions: Pressure Surge Characteristics and Predictive Modeling
Available online 14 September 2025
•Pressure surge mechanism of liquid column separation was revealed.•Influence of gas-liquid ratios and flow regimes on water hammer was quantified.•A critical gas-liquid ratio for negligible water hammer...
Acoustic signal-based identification of pipeline defects using optimized MFCC and LSTM
Available online 13 September 2025
Detecting and classifying structural defects in pipelines under complex operational conditions remains a challenge. This study proposes a multi-class recognition method combining an improved Mel Frequency...
Numerical simulation study on leakage and diffusion of medium and low pressure buried gas pipelines considering soil cavitation effect
Available online 10 September 2025
Buried gas pipelines often experience leakage accidents due to factors such as corrosion, natural disasters, and third-party damage, leading to dangerous events such as fires, explosions, and soil erosion...
Numerical Simulation of High-pressure Cavitation Characteristics of Thick Orifice Plate
Available online 8 September 2025
•Transient simulation can reflect transient and variable cavitation flow•There is a periodic cavitation phenomenon between cavitation and non-cavitation flow•In a certain pressure drop range, periodic...
Synthetic Magnetic Flux Leakage Signal Generation Using Diffusion Models: A Novel Approach to Improve Pipeline Defect Detection Accuracy
Available online 8 September 2025
Magnetic flux leakage (MFL) based inline inspection techniques effectively ensure the safety of oil and gas pipeline transportation. The application of deep learning models to MFL signal processing...
