Experimental study on the effect of high-molecular polymer as drag reducer on drag reduction rate of pipe flow

Quan, Qing; Wang, Shouxi; Wang, Li; Shi, Ying; Xie, Jin; Wang, Xiaodan; Wang, Suwen

doi:10.1016/j.petrol.2019.04.013

Cited by 33 publications

(13 citation statements)

References 23 publications

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“…The reduction in turbulent friction losses by the addition of high-molecular-weight polymers to crude oil pipes has been extensively studied (Table S1). ,− The summary shows that the drag reduction effect of the polymer can be applied to a wide range of oil products, and a significant drag reduction effect can be achieved by adding a small concentration of polymer. The researchers also explored the effects of polymer concentration, Reynolds number, temperature, pipe diameter, and wall roughness on the drag reduction rate, paying special attention to the effects of polymer physical properties such as polymer solubility, molecular weight, and shear degradation resistance on the DR effect.…”

Section: Drag Reducing Additivesmentioning

confidence: 99%

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 Reducing Additivesmentioning

confidence: 99%

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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“…The portion of a molecular-weight distribution of the polymer with a high MW contributes effectively to the DR. [125,126] However, the efficiency of a DRA can also be affected by temperature since its solubility depends on the interaction of the polymer with the surrounding fluid. [127] Quan et al [128] investigated the effect of various factors on DR, such as oil and DRA polymer type, DRA concentration, Reynolds number (Re [3000, 12,000]), temperature, and shear under turbulent flow by using three types of relatively high molecularweight polymers in light oils. The DR rate was reported to increase initially but it was found to be stable at the concentration of 5 ppm.…”

Section: Parametric Optimizationmentioning

confidence: 99%

Applications of drag reducers for the pipeline transportation of heavy crude oils: A critical review and future research directions

et al. 2023

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The long‐distance pipeline transportation of heavy crudes demands optimal pumping procedures to abate overhead expenditures in the midstream phase. This can be facilitated by reducing both the oil viscosity and the frictional losses induced by the turbulent flow zone. The dualistic approach of reducing both viscosity and drag requires the optimization of several parameters such as concentrations and types of diluents and additives. This manuscript critically reviews various technologies being undertaken to facilitate the pipeline transportation of heavy crude oils by highlighting the technique of dilution coupled with the addition of drag reducing agents (DRA). DRA such as surfactants, nanoparticles, bio‐additives, polymers, and fibres are blended with the diluted crudes to suppress the proliferation of turbulent eddies which in turn assist in pumping the oil at a higher flow rate under constant pressure conditions. Several investigations have reported that drag reduction is significantly enhanced by varying the molecular structure of the DRA. In addition, an optimum flow rate coupled with a specific surfactant concentration at an ideal temperature can significantly reduce head losses and pumping expenditures. Further research is imperative to study the effect of the polymer structure with respect to the induced shear degradation and dissolution behavior of the crude.

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“…Quan [26] studied the relationship between the drag reduction rate of a polymer drag reducer and the time when it was sheared in an organic solution. The results showed that with the increase in shear time, the drag reduction rate decreased linearly and finally approached zero.…”

Section: Drag Reduction Is Related To Molecular Weight and Molecular mentioning

confidence: 99%

Research Progress on the Collaborative Drag Reduction Effect of Polymers and Surfactants

Mou

et al. 2020

Materials

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Polymer additives and surfactants as drag reduction agents have been widely used in the field of fluid drag reduction. Polymer additives can reduce drag effectively with only a small amount, but they degrade easily. Surfactants have an anti-degradation ability. This paper categorizes the mechanism of drag reducing agents and the influencing factors of drag reduction characteristics. The factors affecting the degradation of polymer additives and the anti-degradation properties of surfactants are discussed. A mixture of polymer additive and surfactant has the characteristics of high shear resistance, a lower critical micelle concentration (CMC), and a good drag reduction effect at higher Reynolds numbers. Therefore, this paper focuses more on a drag reducing agent mixed with a polymer and a surfactant, including the mechanism model, drag reduction characteristics, and anti-degradation ability.

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Experimental study on the effect of high-molecular polymer as drag reducer on drag reduction rate of pipe flow

Cited by 33 publications

References 23 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

Applications of drag reducers for the pipeline transportation of heavy crude oils: A critical review and future research directions

Research Progress on the Collaborative Drag Reduction Effect of Polymers and Surfactants

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