Modeling of laminar flow in an eccentric elliptical annulus for YPL fluid

Tang, Ming; Zhang, Taiheng; He, Shiming; Kong, Linghao; Li, Heng; Li, Qiuyue

doi:10.1016/j.jngse.2019.02.001

Cited by 11 publications

(6 citation statements)

References 14 publications

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“…The major cause of the pressure drop is energy loss created by the high viscosity of the fluid, as well as head loss according to friction between the drill pipe and the rocks. Since pressure drop investigation is significant to manage wellbore pressure, therefore; the effect of eccentricities was also studied in this work to compare and validate with the published study of Tang and his research group [20] as shown in Fig. 5.…”

Section: The Effect Of Inner Cylinder Rotationmentioning

confidence: 75%

Performance of non-Newtonian fluid in vertical annuli with and without rotation of inner cylinder

Jassim¹,

Khalaf²,

Hashim³

2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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A simulation model of non-Newtonian fluid in vertical, concentric annular flow is used in this work. A prototype of a drilling device is manufactured to compare with the simulation results. Water-based mud rheology is described here with the Bingham plastic model. The simulation results reveal that Bingham plastic fluid has a good attitude during drill pipe rotation in terms of axial velocity, tangential velocity, and molecular viscosity. This influence of rotation on the axial velocity is mirrored in the behavior of the shear stresses inside annular space and hence on the friction factor. However, the rest situation of the drill pipe results in high fluid viscosity. Furthermore, it is found that 0.2 of eccentricity leads to increase the pressure drop inside annuli. Bingham plastic fluid has a great dependence on temperature, and the temperature decreases from top to bottom. This behavior occurs since Bingham fluid flows from up to down during drilling.

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Section: The Effect Of Inner Cylinder Rotationmentioning

confidence: 75%

Performance of non-Newtonian fluid in vertical annuli with and without rotation of inner cylinder

Jassim¹,

Khalaf²,

Hashim³

2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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“…The steady state flow of yield-power-law fluids though the Eccentric elliptical annulus was also simulated via ANSYS Fluent software by Tang et al. 26 The simulation results of axial velocity and pressure gradient using CFD software were found to be in satisfactory agreement with the numerical solutions. Oney Erge et al.…”

Section: Introductionmentioning

confidence: 97%

“…Modeling of laminar flow in an eccentric elliptical annulus for YPL fluid is done by Tang et al. 26 They developed a numerical model to calculate the pressure drop for yield-power-law fluid flow through the Eccentric elliptical annulus with the steady state. The steady state flow of yield-power-law fluids though the Eccentric elliptical annulus was also simulated via ANSYS Fluent software by Tang et al.…”

Section: Introductionmentioning

confidence: 99%

Computational study on drilling mud flow through wellbore annulus by Giesekus viscoelastic model

Hasani

Norouzi

Larimi

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Cuttings transport from wellbore annulus to the surface via drilling fluids is one of the most important problems in gas and oil industries. In the present paper, the effects of viscoelastic property of drilling fluids on flow through wellbore annulus are studied numerically by use of computational fluid dynamics simulation in OpenFOAM software. This problem is simulated as the flow between two coaxial annulus cylinders and the inner cylinder is rotating through its axes. Here, the Giesekus model is used as the nonlinear constitutive equation. This model brings the nonlinear viscosity, normal stress differences, extensional viscosity and elastic property. The numerical solution is obtained using the second order finite volume method by considering PISO algorithm for pressure correction. The effect of elasticity, Reynolds number, Taylor number and mobility factor on the velocity and stress fields, pressure drop, and important coefficient of drilling mud flow is studied in detail. The results predicted that increasing elastic property of drilling mud lead to an initial sharp drop in the axial pressure gradient as well as Darcy-Weisbach friction coefficient. Increasing the Reynolds number at constant Taylor number, resulted an enhancing in the axial pressure drop of the fluid but Darcy-Weisbach [Formula: see text] friction coefficient mainly reduced.

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“…At this stage, most of the numerical simulations are carried out with the help of mathematical software and computational fluids dynamics software. Xu (2020), Tang (2019), Alegria (2012) established a numerical model for yielding power law fluids in the eccentric elliptical annulus based on the assumption of narrow-slot flow model and systematically evaluated the influence of different parameters on the pressure drop. Ferroudji (Hicham et al 2019) analyzed the parameters affecting pressure drop of power-law fluid in horizontal annulus for laminar and turbulent flows by CFD.…”

Section: Introductionmentioning

confidence: 99%

Regression modeling for laminar flow of herschel–barkley fluids in the concentric elliptical annulus

Tang

Kong

et al. 2022

J Petrol Explor Prod Technol

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Deep fractured formations have poor pressure-bearing capacity and a narrow safety drilling fluids density window, leading to high risk of well control. Accurate prediction of annulus pressure drop is great significance to the safe drilling of deep fractured formations. Conventional annulus pressure drop predictions are mostly based on regular circular annulus but elliptical annulus are easily formed due to the rock structure, mechanical properties and heterogeneity of ground stress. In order to accurately and conveniently predict the pressure drop of the Herschel–Barkley (H–B) fluids laminar flow in the concentric annulus of elliptical wellbore (CAEW), an analytical model based on the assumption of narrow-slot flow was established and solved by considering the flow core in this paper. We found that the flow pattern index, the proportion of inner and outer diameter and the proportion of the major and minor axes were the main influencing factors through analysis. On this basis, a new method for predicting pressure drop of the H-B fluids in the CAEW was established. It was found that the new regression model was in excellent agreement with the analytical and numerical models, with most of the error bars within ± 10%, indicating that the regression model could accurately predict the dimensionless pressure gradient in the CAEW without complex mathematic method.

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Modeling of laminar flow in an eccentric elliptical annulus for YPL fluid

Cited by 11 publications

References 14 publications

Performance of non-Newtonian fluid in vertical annuli with and without rotation of inner cylinder

Performance of non-Newtonian fluid in vertical annuli with and without rotation of inner cylinder

Computational study on drilling mud flow through wellbore annulus by Giesekus viscoelastic model

Regression modeling for laminar flow of herschel–barkley fluids in the concentric elliptical annulus

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