Abstract
In this paper, FLUENT is used for iterative calculation of fluids to simulate the solid–liquid mixing into the annulus pipeline. Through simulation, the migration distance of debris particles at different positions under different flow rates, the variation law of volume fraction of debris at the fixed point of the pipeline and the change of sedimentary shape of debris at the bottom of the borehole are studied to explore the influence of the change of dip angle on the migration of debris particles during horizontal directional drilling. The experimental scheme shows that between 0 and 10°, each interval of 2° is set as a group. With the increase of inclination angle, the cuttings in the cross section of the borehole change. At the bottom of the cross section, a large number of cuttings deposit first occurs, and the volume of cuttings at the top decreases. The dip angle continues to increase, and the debris particles at the bottom slightly decrease, which are evenly distributed on both sides, and the volume of debris at the top gradually increases. With the increase of the angle, the cuttings at the bottom of the hole first increase and then decrease, reaching the maximum at 4°. At the same time, the sedimentary shape of the cuttings bed gradually changes from “javelin” to “tadpole” with the change of the angle.
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Acknowledgements
This research was supported by the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project (SKLGP2017Z007), Demonstration of Key Technologies for Monitoring and Early Warning of Major Landslides in Qinghai Province (2021ZY014).
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Zhang, K., Zhao, Z., Huo, Y. (2023). Formation Mechanism and Migration Law of Cuttings Bed in Horizontal Directional Drilling. In: Liu, X. (eds) Proceedings of 2021 China-Europe International Conference on Pipelines and Trenchless Technology. Lecture Notes in Civil Engineering, vol 212. Springer, Singapore. https://doi.org/10.1007/978-981-19-4067-5_8
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DOI: https://doi.org/10.1007/978-981-19-4067-5_8
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