The Effect of Thixotropy on Pressure Losses in a Pipe

Cayeux, Eric; Leulseged, Amare

doi:10.3390/en13236165

Cited by 19 publications

(9 citation statements)

References 20 publications

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“…The first sensor is placed 1.955 m away from the change in diameter from 25 mm to 15.5 mm. The second sensor is positioned 1.415 m apart from the first one and the last sensor is separated from the previous by 1.46 m. A schematic representation can be found in figure 8 of [16], reproduced here as Figure 1. There is also a pressure-reducing valve placed 1.5 m upstream from the change in diameter.…”

Section: Laboratory Flow Loopmentioning

confidence: 99%

Precise Method to Estimate the Herschel-Bulkley Parameters from Pipe Rheometer Measurements

Magnon

Cayeux

2021

Fluids

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Accurate characterization of the rheological behavior of non-Newtonian fluids is critical in a wide range of industries as it governs process efficiency, safety, and end-product quality. When the rheological behavior of fluid may vary substantially over a relatively short period of time, it is desirable to measure its viscous properties on a more continuous basis than relying on spot measurements made with a viscometer on a few samples. An attractive solution for inline rheological measurements is to measure pressure gradients while circulating fluid at different bulk velocities in a circular pipe. Yet, extracting the rheological model parameters may be challenging as measurement uncertainty may influence the precision of the model fitting. In this paper, we present a method to calibrate the Herschel-Bulkley rheological model to a series of differential pressure measurements made at variable bulk velocities using a combination of physics-based equations and nonlinear optimization. Experimental validation of the method is conducted on non-Newtonian shear-thinning fluid based on aqueous solutions of polymers and the results are compared to those obtained with a scientific rheometer. It is found that using a physics-based method to estimate the parameters contributes to reducing prediction errors, especially at low flow rates. With the tested polymeric fluid, the proportion difference between the estimated Herschel-Bulkley parameters and those obtained using the scientific rheometer are −24% for the yield stress, 0.26% for the consistency index, and 0.30% for the flow behavior index. Finally, the computation requires limited resources, and the algorithm can be implemented on low-power devices such as an embedded single-board computer or a mobile device.

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Section: Laboratory Flow Loopmentioning

confidence: 99%

Precise Method to Estimate the Herschel-Bulkley Parameters from Pipe Rheometer Measurements

Magnon

Cayeux

2021

Fluids

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“…Numerical simulations significantly reduce the cost of experimental materials and equipment, shorten the preparation time, and maximize the reproduction of field conditions that cannot be achieved in the laboratory (Cayeux and Leulseged, 2020;Gao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Multi-criteria comparative analysis of the pressure drop on coal gangue fly-ash slurry at different parts along an L-shaped pipeline

Wang

Jiao

Cheng

et al. 2022

Preprint

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Disposing coal gangue and fly-ash on the surface is a risky method which has tremendous potential catastrophic consequences for the environment, whereas backfill mining is a promising practice turing those hazardous wastes into useful backfill materials. Unfortunately, how to deliver the slurry into avoid efficiently remains underresearched, therefore, to address this gap, in the present paper, in addition to a laboratory rheological test, computational fluid dynamics software Fluent was also employed to simulate the different effects that individual variables have on the pressure evolution at a specific section of the pipeline. Furthermore, the response surface method was implemented to examine how the multiple factors synergistically affect the pressure drop and their corresponding influencing weights. This paper shows that slurry concentration, speed, and pipe diameter all significantly affect the pressure drop of slurry and that conveying speed is the dominant factor in the bend section. In contrast, pipe diameter becomes the dominant factor in the horizontal and vertical pipe sections.

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“…Therefore, tests have been conducted in a sufficiently large laboratory setup using various field applied drilling fluids to improve engineering models and practices both for hole cleaning and frictional pressure losses [2][3][4][5][6]. Some attempts have been performed to describe fluid properties using a semi-physical description like the Quemada model [7,8,9]. It is still not yet clear if the use of this understanding will provide additional information for the cuttings transport properties.…”

Section: Introductionmentioning

confidence: 99%

Cuttings Transport With Oil- and Water-Based Drilling Fluids

Ytrehus

Lund

Taghipour

et al. 2021

Volume 10: Petroleum Technology

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Deviated well sections are common in modern well construction. In mature areas like the North Sea region, practically all producers or injector wells will have highly deviated sections. These wells must be drilled and completed in an optimal manner with respect to drill time, cost, risk and functionality. Most cuttings transport and hydraulic models are developed based on tests with model fluids and often in small diameter test sections. Hole cleaning properties and hydraulic behaviour of field fluids differ from those of most model fluids. Furthermore, results from small diameter tests may not always be relevant for, nor scalable to, field applications due to time, length and other scale differences. Hence, there is a need for studies in controlled laboratory environments with various field application designed drilling fluids to improve engineering models and practices. This paper presents results from laboratory tests using field applied fluids. The drilling fluids have similar density and viscosity within the relevant shear rate range applied during drilling operations and in the tests. One of the fluids is oil-based and the other one is an inhibitive water-based drilling fluid.

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The Effect of Thixotropy on Pressure Losses in a Pipe

Cited by 19 publications

References 20 publications

Precise Method to Estimate the Herschel-Bulkley Parameters from Pipe Rheometer Measurements

Precise Method to Estimate the Herschel-Bulkley Parameters from Pipe Rheometer Measurements

Multi-criteria comparative analysis of the pressure drop on coal gangue fly-ash slurry at different parts along an L-shaped pipeline

Cuttings Transport With Oil- and Water-Based Drilling Fluids

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