Characterization of the pressure loss coefficient using a building block approach with application to by-pass pigs

Hendrix, M.H.W.; Liang, Xiaohui; Breugem, Wim-Paul; Henkes, R.A.W.M.

doi:10.1016/j.petrol.2016.11.009

Cited by 29 publications

(4 citation statements)

References 12 publications

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“…3. By comparing formulas (2) and (6), it can be known that when the pressure difference changes, the change in the driving force is greater than the change in the friction force. Based on this principle, the reason why the moving speed of PIG can be controlled by changing the diameter of the bypass hole of the bypass valve could be explained.…”

Section: Friction Forcementioning

confidence: 99%

“…When the bypass PIG has stable motion and steady speed, the driving force generated by the flow field to the PIG is equal to the friction generated by the contact between the PIG and the pipe. 6 The change in the speed of PIG will cause the change in the flow field in the pipe, that is, the driving force and friction force of PIG. Therefore, the speed of PIG is closely related to the friction force.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and simulation on speed prediction of bypass pipeline inspection gauge in medium of water and crude oil

Zhang

Yang

Hou

et al. 2020

Measurement and Control

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Bypass pipeline inspection gauges have the advantages of low cost and bringing no consumption in transportation efficiency and have been widely used in pipe cleaning, inspecting, and maintaining operations. The moving speed of bypass pipeline inspection gauges will seriously affect the results of the operations, so there are strict requirements on the moving speed of bypass pipeline inspection gauges. Because the moving speed of pipeline inspection gauge is difficult to measure or control in real time, it is important to predict it. This paper studies the influencing factors and their impact methods of pipeline inspection gauges’ motion. Through the combination of computational fluid dynamics simulation and friction mathematical model, the relationship between the value of the bypass hole diameter and the pipeline inspection gauges’ moving speed was studied. Under the selected research conditions, when the diameter of the bypass hole is increased from 0.1 to 0.5 m, the moving speed of pipeline inspection gauge in water and crude oil is, respectively, decreased from 2.779 to 0.589 m/s and from 2.777 to 0.373 m/s, and the relationship between them can be approximately described by a function. Based on this principle, the moving speed of pipeline inspection gauge can be predicted mathematically. The experiments also indicate that the density and dynamic viscosity of the transport medium and the deformation amount of the bypass pipeline inspection gauge sealing disk will affect the movement state of pipeline inspection gauge in the pipeline. This research has guiding significance for the design of the pipeline inspection gauges’ structure size, which is beneficial to the pipeline robot to better meet the needs of cleaning, inspecting, and maintaining operations, and has reference value for related researches.

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Section: Friction Forcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and simulation on speed prediction of bypass pipeline inspection gauge in medium of water and crude oil

Zhang

Yang

Hou

et al. 2020

Measurement and Control

View full text Add to dashboard Cite

show abstract

“…Based on current research, gas-liquid two-phase flow in pipelines is well established in numerical simulation. To ensure the accuracy and practicality of research findings, it is imperative to conduct experiments to understand the actual patterns of gas and liquid-phase velocity changes [21]. However, we encountered several challenges during these experiments, including the frequent occlusion of the pig during prolonged operation.…”

Section: Introductionmentioning

confidence: 99%

PIV Experimental Research and Numerical Simulation of the Pigging Process

Chen,

Zhang,

et al. 2024

JMSE

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The initial running speed of the pig during gas–liquid two-phase pipeline pigging can significantly influence the velocities of both gas and liquid phases within the pipeline. However, due to the complexity and limited understanding of these velocity variations, developing an effective operational plan for pigging becomes challenging. To enhance pigging efficiency and effectively seal the pig, it is crucial to monitor the velocity variations in the gas–liquid phase within the pipeline. In this study, an experimental platform was established to facilitate precise observation of these variations. Particle image velocimetry (PIV) technology was employed for a comprehensive understanding of gas–liquid two-phase velocities during pig operation in the pipeline. The experimental results demonstrated that increasing both the velocity and the initial liquid level height of the pig resulted in a corresponding augmentation of velocity fluctuation range. Specifically, at a holdup rate of 30%, there was a 10% reduction in the maximum liquid-phase velocity, while at a holdup rate of 25%, this reduction amounted to 16% compared to the pigging velocity.

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“…Today, about 50% pipelines around the world are aging, and regular pipeline inspections are urgently needed [3]. Due to the particularity of the oil pipeline laying environment, pipeline inspection gauge (PIG) has become the most effective and economical detection method at this stage [4,5].…”

Section: Introductionmentioning

confidence: 99%

Experiments and modeling of fluctuating frictional force of pipeline inspection gauges

Zhong-Chao

Song

2023

Meas. Sci. Technol.

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At present, pipeline inspection gauge (PIG) is the main means to ensure the reliability of oil and gas transportation pipelines. Due to the unstable friction between the PIG and the pipeline, the failure and blockage of the PIG often occur. In this paper, the theoretical modeling and experimental measurement of fluctuate friction on PIG are studied. Firstly, considering the coupling relationship between cylindrical shell and conical shell, the contact radial force model between PIG and pipeline is derived. Based on which, the nonlinear frictional model of PIG is proposed, and the parameters are measured by several experiments. Then an experimental platform is developed to measure the fluctuate friction force of PIG in actual operation, and verify the accuracy of the proposed model. The motion characteristic analysis and dynamics research are carried out, and the PIG creeping phenomenon caused by fluctuating friction is explained. Finally, based on the proposed nonlinear friction model, the influence of parameters is analyzed. The conclusions based on the proposed model and the experiments results can provide technical supports for practical engineering application.

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Characterization of the pressure loss coefficient using a building block approach with application to by-pass pigs

Cited by 29 publications

References 12 publications

Modeling and simulation on speed prediction of bypass pipeline inspection gauge in medium of water and crude oil

Modeling and simulation on speed prediction of bypass pipeline inspection gauge in medium of water and crude oil

PIV Experimental Research and Numerical Simulation of the Pigging Process

Experiments and modeling of fluctuating frictional force of pipeline inspection gauges

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