Numerical investigation of a double-circulation system for cuttings transport in CBM well drilling using a CFD-DEM coupled model

Shao, Bing; Yan, Yifei; Wang, Xiaomei; Liao, Fujin; Yan, Xiangzhen

doi:10.1080/19942060.2019.1680441

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…Proppants affect fluid flow, which is reflected by the volume fraction of the fracturing fluid and the momentum exchange source between the fracturing fluid and proppants. The continuity equation of fracturing fluid is expressed as follows: ∂ ∂ t false( α f ρ f false) + ∇ · false( α f ρ f u f false) = 0 α f = n f N in which α f is the fluid volume fraction, ρ f is the fluid density, kg m –3 , u f is the fluid velocity, m s –1 , and n f is the number of fluid points in the grid unit. N is the total number of points in the grid unit.…”

Section: Mathematical Modelmentioning

confidence: 99%

Numerical Simulation of Proppant Transport in Major and Branching Fractures Based on CFD-DEM

Zuo,

Li,

Han

et al. 2024

ACS Omega

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This research investigated the effect of branching fracture, proppant, and fracturing fluid on proppant transport based on the CFD-DEM coupling model. The obtained results show that the balance height of embankment in the major fracture decreases gradually with increasing angle between major and branching fractures, while it increases gradually in the branching fracture. This is because the additional resistance of fracturing fluid flow at the joint increases with increasing angle, leading to the decrease of the fracturing fluid velocity. The proppant is prone to settling in branching fractures, resulting in the increase of embankment height in the branching fracture. At angles of 45, 60, and 90°, as the diameter of the proppant increases from 0.8 to 1.1 mm, the balance height of embankment increases slightly in the major fracture, while it decreases in the branching fracture. The frictional resistance of the fracture wall enhances the difficulty of large proppant entering the branching fracture, resulting in a decrease in the amount of proppant entering the branching fracture and a decrease of the balance height of embankment in the branching fracture. In the low-viscosity fracturing fluid, the proppant quickly deposits at the bottom of the fracture as it enters the fracture. Improving the viscosity of the fracturing fluid can significantly enhance its ability to transport the proppant. The proppant is less likely to quickly settle in high-viscosity fracturing fluids, especially when the fracturing fluid viscosity exceeds 50 mPa·s.

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Section: Mathematical Modelmentioning

confidence: 99%

Numerical Simulation of Proppant Transport in Major and Branching Fractures Based on CFD-DEM

Zuo,

Li,

Han

et al. 2024

ACS Omega

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“…In this paper, the slag discharge mechanism of rib drill pipe is analyzed. Based on the computational fluid dynamics (CFD) method [19], the Edem-Fluent coupling platform is used to simulate the slag discharge process of rib drill pipe [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Structure Optimization of Rib Drill Pipe Based on Gas-Solid Coupling and Orthogonal Experiment

Zhong

et al. 2020

Shock and Vibration

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At present, drilling rig is a common equipment for controlling gas outburst generated in underground coal mine, and rib drill pipe is an important component of drilling rig. Due to the insufficiency of slag discharge capacity, pipe-sticking accidents often occur during the drilling process, which greatly reduces the effect of gas control. In order to improve the capacity of slag discharge of rib drill pipe, the mechanism of slag removal was analyzed, and the process of slag discharge was simulated as a gas-solid two-phase flow coupling process. Utilizing the computational fluid dynamics method, the process of slag discharge was simulated on the Edem-Fluent cosimulation platform. The structural parameters of the drill pipe affecting the capacity of slag discharge were derived. Based on the analysis results, the structural parameters of rib drill pipe were optimized by orthogonal experiment method. The global optimal results were obtained as follows: its pitch, blade height, and blade width are 120 mm, 3 mm, and 15 mm, respectively. Therefore, the results of slag discharge experiment on the optimum structure of rig drill pipe show that the slag discharge efficiency is increased by 11.38%, which effectively resolves the pipe-sticking problem.

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Developments and applications of the CFD-DEM method in particle–fluid numerical simulation in petroleum engineering: A review

Wang

Gong

et al. 2023

Applied Thermal Engineering

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Numerical investigation of a double-circulation system for cuttings transport in CBM well drilling using a CFD-DEM coupled model

Abstract: Numerical investigation of a double-circulation system for cuttings transport in CBM well drilling using a CFD-DEM coupled model, Engineering

Cited by 4 publications

References 42 publications

Numerical Simulation of Proppant Transport in Major and Branching Fractures Based on CFD-DEM

Numerical Simulation of Proppant Transport in Major and Branching Fractures Based on CFD-DEM

Structure Optimization of Rib Drill Pipe Based on Gas-Solid Coupling and Orthogonal Experiment

Developments and applications of the CFD-DEM method in particle–fluid numerical simulation in petroleum engineering: A review

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