Numerical study on cuttings transport in vertical wells with eccentric drillpipe

GhasemiKafrudi, Esmaeil; Hashemabadi, Seyed Hassan

doi:10.1016/j.petrol.2015.12.026

Cited by 44 publications

(6 citation statements)

References 10 publications

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“…However, they did not consider the rotation of the inner cylinder around its central axis. Furthermore, it was found that eccentricity causes a decrease in pressure loss contrary to the numerical investigation of GhasemiKafrudi and Hashemabadi (2016) where they found that pressure loss amplifies with the increment of the eccentricity in the presence of cuttings. Pang et al (2019) conducted simulation studies on the influence of the inner cylinder orbital motion on cuttings transport using the commercial code ANSYS-Fluent.…”

Section: Introductionmentioning

confidence: 68%

Effect of drill pipe orbital motion on non-Newtonian fluid flow in an eccentric wellbore: a study with computational fluid dynamics

Ferroudji

Hadjadj

Ofei

et al. 2021

J Petrol Explor Prod Technol

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To ensure an effective drilling operation of an explored well, the associated hydraulics program should be established carefully based on the correct prediction of a drilling fluid’s pressure drop and velocity field. For that, the impact of the drill string orbital motion should be considered by drilling engineers since it has an important influence on the flow of drilling fluid and cuttings transport process. In the present investigation, the finite volume method coupled with the sliding mesh approach is used to analyze the influence of the inner cylinder orbital motion on the flow of a power-law fluid (Ostwald-de Waele) in an annular geometry. The findings indicate that the orbital motion positively affects the homogeneity of the power-law axial velocity through the entire eccentric annulus; however, this impact diminishes as the diameter ratio increases. In addition, higher torque is induced when the orbital motion occurs, especially for high values of eccentricity and diameter ratio; nonetheless, a slight decrease in torque is recorded when the fluid velocity increases.

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Section: Introductionmentioning

confidence: 68%

Effect of drill pipe orbital motion on non-Newtonian fluid flow in an eccentric wellbore: a study with computational fluid dynamics

Ferroudji

Hadjadj

Ofei

et al. 2021

J Petrol Explor Prod Technol

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“…A similar definition was used before in [34,41]. In this case, CTP = 1 means that the sludge is moving on average at the velocity of drilling fluid, and the efficiency of flushing-out of the well is maximal, while CTP = 0 means that the sludge particles are not transported.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Mathematical modelThe isothermal, laminar, fully developed and steady flow of an incompressible fluid with constant density was considered in the study. The Eulerian-Eulerian two-phase flow model was used to study the flow behaviour of cuttings and drilling fluid in an annulus[24][25][26][27][28][29][30][31][32][33][34][35]. The Eulerian model assumes that the sludge flow consists of solid «s» and fluid «f» phases, which are separate, yet they form interpenetrating continua, so that , where and are the volume concentrations of the fluid phase and the solid phase, respectively.…”

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confidence: 99%

The effect of nanoparticles additives in the drilling fluid on pressure loss and cutting transport efficiency in the vertical boreholes

Минаков

Жигарев

Mikhienkova

et al. 2018

Journal of Petroleum Science and Engineering

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The effect of nanoparticles of various chemical components and sizes on the rheological behaviour of drilling fluids, pressure loss and cuttings transport in the vertical borehole for a laminar flow regime is considered in the paper. The results of numerical and experimental studies are presented. Silicon, aluminium and titanium oxides nanoparticles are considered. A drilling fluid is Bentonite-water solution with a mass fraction of 5%. The particles concentration in the solution was varied from 0.25 to 2 weight percentages and the particles sizes ranged from 5 to 50 nm. The dependences of the effective viscosity and rheological parameters of the solutions on the nanoparticles concentrations, sizes and materials were obtained. It was shown that nanoparticles in drilling fluid increase cuttings transport by 17% and decrease the average slip velocity of the sludge particles in 1.7 to 2.0 times, but the pressure losses when pumping the drilling fluid increase in 2.5 times.

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“…However, the understanding of microscopic flow details caused by the elliptical drillpipe is limited in the experiment. With the development of computer technology, this understanding can be significantly improved using the computational fluid dynamics (CFD) technique, due to its advantages of revealing the internal flow mechanism of solid-liquid two-phase and the flow details [26,27].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Effective Hole Cleaning by Using an Innovative Elliptical Drillpipe in Horizontal Wellbore

Yan

Sun

2022

Energies

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In the drilling of horizontal wells, the drill cuttings tend to settle down on the low side of the annulus due to gravity and form a stationary bed, which results in hole cleaning problems. In this paper, a novel type of drillpipe with an elliptical shape was proposed to alleviate inadequate hole cleaning during the drilling of horizontal wells. A three-dimensional computational fluid dynamic (CFD) Eulerian-Eulerian approach with the Realizable k-ɛ turbulence model was developed to predict the solid–liquid two-phase flow in the annular space. Numerical examples were given to investigate the influence of different parameters on cuttings’ transport behavior, and the elliptical drillpipe was compared with the circular drillpipe. The annular cuttings concentration, annular pressure drop, and hole cleaning efficiency were evaluated. The numerical results clarify the potential of the elliptical drillpipe to enhance the hole cleaning efficiency without significantly increasing the annular pressure drop. Due to the swirl flow and secondary flow caused by the rotation of the curvature wall, the swaying phenomenon of drill cuttings’ distribution along the rotation direction of drillpipe was observed and enhanced the cuttings transport ability. Using the elliptical drillpipe as a joint-type tool can improve hole cleaning performance. Under the optimum conditions applied in this study, the hole cleaning efficiency increased by nearly 18%.

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Numerical study on cuttings transport in vertical wells with eccentric drillpipe

Cited by 44 publications

References 10 publications

Effect of drill pipe orbital motion on non-Newtonian fluid flow in an eccentric wellbore: a study with computational fluid dynamics

Effect of drill pipe orbital motion on non-Newtonian fluid flow in an eccentric wellbore: a study with computational fluid dynamics

The effect of nanoparticles additives in the drilling fluid on pressure loss and cutting transport efficiency in the vertical boreholes

Numerical Simulation of Effective Hole Cleaning by Using an Innovative Elliptical Drillpipe in Horizontal Wellbore

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