Effect of Yield Power Law Fluid Rheological Properties on Cuttings Transport in Eccentric Horizontal Narrow Annulus

Ofei, Titus Ntow

doi:10.1155/2016/4931426

Cited by 20 publications

(6 citation statements)

References 32 publications

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“…The viscosity of Newtonian fluid is not affected by the shear rate, so the settling velocity of the particles in Newtonian fluid is only related to the particle diameter. However, most of the fluids used in practical engineering are non-Newtonian fluids [52,53]. The viscosity of the non-Newtonian fluid is affected by the shear rate, and the increase in the shear rate will reduce the viscosity and increase the settling rate of the particles.…”

Section: The Impact Of Fluid Rheology On the Particle Sedimentation Lawmentioning

confidence: 99%

A Review of the Settling Law of Drill Cuttings in Drilling Fluids

Hou,

Yuan,

Chen

et al. 2023

Processes

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During the drilling process, cuttings settle under the action of gravity, which easily results in the formation of a cuttings bed, which then results in wellbore cleaning problems. The settling law of cuttings in drilling fluid is essentially a problem of solid–liquid two-phase settling. This study analyzes and summarizes the effects of the wall effect, the rheology of the fluid, particle shape irregularity, and particle concentration on the settling rate of particles and clarifies the problems faced by current research on the settling rate of particles and the development direction. Studies have shown that walls exert additional blocking effects on particles, thus reducing their settling velocity. The shear thinning effect of non-Newtonian fluids such as power-law fluids and Herschel–Bulkley fluids will reduce the viscosity of the liquid, thus increasing the settling velocity of the particles. Compared with spherical particles, irregular particles will obtain higher resistance in the fluid, leading to a decline in the particle settling velocity. The mutual interference between particles will result in an increase in the drag force on the particles and a decline in the settling velocity. However, when the particles are aggregated, the settling velocity will increase. This study can provide theoretical guidance for predicting the migration law of cuttings during the drilling of horizontal wells, and it has important significance for enriching the theory of solid–liquid two-phase flow.

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Section: The Impact Of Fluid Rheology On the Particle Sedimentation Lawmentioning

confidence: 99%

A Review of the Settling Law of Drill Cuttings in Drilling Fluids

Hou,

Yuan,

Chen

et al. 2023

Processes

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“…e focus of these studies was to understand the hydrodynamics of the slurry flow in annulus from real-time experiments and to produce empirical models based on data analysis. Recently, different researchers [15][16][17] have used CFD in studying the transportation of slurry in annuli. Ofei [15] examined the effect of the rheological parameters of the carrying fluids on the velocity of solid.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Recently, different researchers [15][16][17] have used CFD in studying the transportation of slurry in annuli. Ofei [15] examined the effect of the rheological parameters of the carrying fluids on the velocity of solid. Sorgun and Ulker [16] compared the predictions of pressure losses obtained using artificial neural network (ANN) and CFD.…”

Section: Literature Reviewmentioning

confidence: 99%

CFD Analysis of Pressure Losses and Deposition Velocities in Horizontal Annuli

Sultan¹,

Rahman

Rushd

et al. 2019

International Journal of Chemical Engineering

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Estimation of pressure losses and deposition velocities is vital in the hydraulic design of annular drill holes in the petroleum industry. The present study investigates the effects of fluid velocity, fluid type, particle size, particle concentration, drill string rotational speed, and eccentricity on pressure losses and settling conditions using computational fluid dynamics (CFD). Eccentricity of the drill pipe is varied in the range of 0–75%, and it rotates about its own axis at 0–150 rpm. The diameter ratio of the simulated drill hole is 0.56. Experimental data confirmed the validity of current CFD model developed using ANSYS 16.2 platform.

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“…As a consequence, the jet is taken into consideration as a two-phase (gas-liquid), the system with the liquid jet expanding through the air space of the chamber. There are a number of methods to computing two-phase flows, and the continuous phase fluid is always treated by the Eulerian method [7,9]. For the universality of the research, water and air are taken as research objects.…”

Section: Theoretical Modelmentioning

confidence: 99%

Computational Fluid Dynamics Simulation of High Speed Jet Under Different Input Pressures

Gong¹

2017

IJHEP

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Abstract:The aim of this study is to execute the computational fluid dynamics (CFD) simulation of high speed jet under different input pressures (i.e., 80, 120, 160, 200, and 240 MPa). In particular, this study focuses on the pressure distributions and streamlines of the orifice in high speed jet, primarily because the orifice plays a role in accelerating the flow of liquid, having significant effects on the working performance of high speed jet. Firstly, the two-dimensional geometric model of high speed jet is established on the basis of the actual operational conditions. Next, the unstructured grids of high speed jet are generated by means of ICEM CFD 16.0. Virtually, the computational fluid dynamics simulation of high speed jet is a two-phase flow (gas-liquid) problem, so the homogeneous (Eulerian-Eulerian) two-phase model is employed to carry out the gas-liquid interaction. Particularly, the turbulent flow computation of high speed jet is carried out with procedures based on the Reynolds-averaged Navier-Stokes (RANS) equations. As the flow of high speed jet is highly turbulent, the RNG k-ɛ turbulence model derived by Yakhot et al. (1992) is utilized in this study. Finally, the computational fluid dynamics (CFD) simulation of high speed jet is implemented by using the CFX-Solver in ANSYS CFX 16.0. The simulation results show that when liquid flows through the orifice, the pressure of flows decreases swiftly, whereas the velocity of flows skyrockets to the maximum value and then decreases slightly. In addition, the relationship between the working pressure and input pressure and the relationship between the working velocity and input pressure are achieved, which could provide certain theoretical guidance for predicting the working pressure and velocity of high speed jet based on real input pressures.

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Effect of Yield Power Law Fluid Rheological Properties on Cuttings Transport in Eccentric Horizontal Narrow Annulus

Cited by 20 publications

References 32 publications

A Review of the Settling Law of Drill Cuttings in Drilling Fluids

A Review of the Settling Law of Drill Cuttings in Drilling Fluids

CFD Analysis of Pressure Losses and Deposition Velocities in Horizontal Annuli

Computational Fluid Dynamics Simulation of High Speed Jet Under Different Input Pressures

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