Experimental study on highly viscous oil-water annular flow in a horizontal pipe with 90° elbow

Jing, Jiaqiang; Yin, Xiaoyun; Мастобаев, Б. Н.; Valeev, Anvar; Sun, Jie; Wang, Sihan; Liu, Huaping; Zhuang, Lequan

doi:10.1016/j.ijmultiphaseflow.2020.103499

Cited by 17 publications

(14 citation statements)

References 30 publications

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Section: Drag Reduction By Boundary Injection Of Low-viscosity Fluidmentioning

confidence: 99%

“…It can be seen that the oil–water CAF technology has an absolute advantage in terms of DR effect compared with other technologies, and has attracted the interest of a large number of researchers (Table S2). − …”

Section: Drag Reduction By Boundary Injection Of Low-viscosity Fluidmentioning

confidence: 99%

“…Additives such as polymers, surfactants, and nanoparticles are added to pure water to form an aqueous solution to achieve efficient DR of lubrication and long-term prevention of oil stains from sticking to the wall. Jing et al combined the lubrication-isolation effect of water film on heavy oil flow and the turbulent DR effect of nonionic polyacrylamide (PAM) in high-speed flow. After experimental research, it is found that adding an appropriate amount of PAM to the water film near the pipe wall can effectively enhance the stability of CAF, decrease the friction of two-phase flow, and realize the synergistic effect of interface lubrication and turbulent drag reduction of the lubricating medium.…”

Section: Drag Reduction By Boundary Injection Of Low-viscosity Fluidmentioning

confidence: 99%

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Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Jing,

Guo,

Karimov

et al. 2023

Ind. Eng. Chem. Res.

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With the depletion of conventional light crude oil, heavy crude oil will occupy an increasing share of the energy structure in the 21st century. Heavy crude oil is characterized by an API gravity of 10 to 22.3 or a viscosity of 0.09 to 10 Pa·s. The flow of heavy crude oil in the pipeline is laminar in the higher viscosity range and turbulent in the lower viscosity range, and its flow resistance comes from the viscous force between the oil and the wall or the additional stress of turbulent flow. Hence, pipeline transportation of heavy crude oil is faced with a huge loss of frictional resistance, which means a reduction of the transportation efficiency. To decrease pump power consumption, improving the transportation efficiency of heavy crude oil pipelines is a key factor. In recent years, some biomimetic technologies that reduce the flow resistance of viscous oils have made new progress in improving their fluidity and have not yet been put into use in commercial pipelines. Therefore, it is important and appropriate to discuss the breakthrough achievements and progress made by researchers in the drag reduction (DR) of heavy crude oil and to summarize its advantages, disadvantages, and potential problems. This review discusses boundary layer control methods for heavy crude oil drag reduction. First, conventional DR technologies, such as polymers, surfactants, fiber suspensions, oil–water core annular flow (CAF) and oil–aqueous foam CAF, and potential DR technologies, including oleophobic surfaces, flexible walls, biomimetic microgrooves, and ferrofluid annular DR under magnetic confinement, are presented. Second, the mechanism of DR is investigated and summarized; the highlights and progress of the technology are reviewed, and new ideas to improve the existing DR technology are proposed. Finally, the challenges and prospects of DR are presented.

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Section: Drag Reduction By Boundary Injection Of Low-viscosity Fluidmentioning

confidence: 99%

Section: Drag Reduction By Boundary Injection Of Low-viscosity Fluidmentioning

confidence: 99%

Section: Drag Reduction By Boundary Injection Of Low-viscosity Fluidmentioning

confidence: 99%

See 1 more Smart Citation

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Jing,

Guo,

Karimov

et al. 2023

Ind. Eng. Chem. Res.

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“…In recent years, scholars at home and abroad have conducted a large amount of theoretical analysis, experimental research, and numerical simulation on the heavy oil–water ring transportation technology, where they have mainly focused on the problems of heavy oil–water ring transportation under normal operating conditions, such as the optimization design of water ring generators and their auxiliary components, − the lubrication and drag reduction mechanism of heavy oil–water ring transportation, − the flow pattern and pressure drop characteristics of heavy oil–water ring flow, − and the enhancement measures for the flow stability of heavy oil–water ring flow. − However, little attention has been paid to the difficult problem of restarting after shutdown due to planned maintenance or unexpected shutdown. In view of this, four ordinary heavy oils from the Lvda oilfield and tap water are taken as research objects, and a simulation experimental system is independently designed and developed to investigate the flow, shutdown, and restart-up of the heavy oil–water ring transportation pipeline.…”

Section: Introductionmentioning

confidence: 99%

Predictive Model of Restart-Up Pressure Drop after Shutdown for Heavy Oil–Water Ring Transportation Pipeline

Yin,

Wen,

Lin

et al. 2024

ACS Omega

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Aiming at the problem of restart-up for a heavy oil−water ring transportation pipeline due to instability and damage of the water ring, based on the self-developed design of a small indoor loop simulation experimental device and taking four kinds of ordinary heavy oil in the Lvda oilfield as the research object, the change trend of restart-up pressure drop with time is experimentally studied when the pipeline is restarted-up after shutdown at a constant water flow. On the basis of the regression analysis of the orthogonal restart-up experimental data of four factors (oil holdup, oil viscosity, standstill period, and water cleaning superficial velocity) and mixed levels by the statistical product and service solutions statistical analysis software, a multivariate nonlinear restartup maximum pressure drop prediction model is established. Through analysis of the characteristics of each stage of the restart-up process, an exponential decay model of restart-up pressure drop with time is created. The research results show that the variations in restart-up pressure drop with time can be divided into two stages: the attenuation stage and the equilibrium stage. The predicted value of restart-up pressure drop with time is in good agreement with the measured one, and the goodness of fit is very close to 1. The maximum restart-up pressure drop rises along with the increase in oil holdup, oil viscosity, standstill period, and water cleaning superficial velocity. The restart-up time prolongs with the increase in oil holdup, oil viscosity, and standstill period but shortens with the increase in water cleaning superficial velocity.

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“…Elbow pipes with uniform wall thickness, small curvature, thin wall and high intensity are used more and more in petroleum, chemical, metallurgy, boiler and other industrial production unit [1][2][3]. When using traditional bending process for forming, the wall thickness easily appears uneven because the convex side of the elbow pipe is under tensile forces and the concave side is under compression.…”

Section: Introductionmentioning

confidence: 99%

Technological parameters optimization and numerical simulation of hot pushing pipe bending process

Huang

Zhang

et al. 2023

Int J Adv Manuf Technol

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Elbow pipes are widely used in many industries such as petroleum, chemical, metallurgy. Of various elbow pipe forming technology, hot pushing pipe bending process is an efficient and economical one for processing elbow pipes. This paper introduced the technological process and plastic deformation mechanism of hot pushing pipe bending. Four deformation assumptions were proposed to describe the main deformation characteristics in the bending process. The proportional relationship between the bending deformation and the diameter expansion deformation was derived and the horn mandrel was designed. The forming process of the elbow was simulated and the metal flow in the forming process of the elbow was obtained. By using orthogonal experiment, the influence rules of heating temperature, pushing speed, friction factor, bending angle and initial bending radius on the process were obtained, and the optimal process parameters were obtained. It will play a positive role in revealing the pipe forming mechanism and have a guiding effect on production practice.

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Experimental study on highly viscous oil-water annular flow in a horizontal pipe with 90° elbow

Cited by 17 publications

References 30 publications

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Predictive Model of Restart-Up Pressure Drop after Shutdown for Heavy Oil–Water Ring Transportation Pipeline

Technological parameters optimization and numerical simulation of hot pushing pipe bending process

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