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Simulation study on the disaggregating mechanism of wet agglomerates in water-based drilling cuttings based on discrete element method

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Abstract

Agglomerates in water-based drilling cuttings could reduce the separating efficiency of solid–liquid materials and increase the difficulty of dehydration processing. In order to reveal the interaction mechanism of the particles and agglomerates for improving the processing efficiency, a new method of using the ultrafine particles in the water jet to impact wet agglomerates is proposed. Firstly, the interaction forces between the wet particles are analyzed and discussed theoretically. Then, based on the contact model and actual particle size, the boundary conditions and simulation model are decided and built by using discrete element method. Lastly, by carrying out the numerical simulations of the interaction process, the influences of the ultrafine particle sizes and initial velocities on the disaggregation of wet agglomerates are discussed for revealing the disaggregation mechanism of the wet agglomerates. Study results show that: (1) at fixed initial velocity, the bond failure rate of the wet agglomerates increases with the particle size. Besides, when the ultrafine particle size arrives to 0.3 mm and its initial velocity exceeds 90 m/s, the bond failure rate of the agglomerate could reach to 95%. (2) At fixed particle size, the bond failure rate of the wet agglomerates increases with the initial velocity of the ultrafine particles. However, when the ultrafine particle size is smaller than 0.1 mm, the influence of the initial velocity on the disaggregation of the wet agglomerates could be too small to be observed. (3) For a higher disaggregation effect, a bigger ultrafine particle size with higher initial velocity will be recommended.

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Acknowledgements

This work is financially supported by the Science and Technology Planning projects in Sichuan Province(2021YFG0264) and the National Natural Science Foundation of Youth (61801319).

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Authors and Affiliations

  1. Sichuan University of Science and Engineering, Yibin, 644000, Sichuan, China

    Zhongbin Liu, Lin Chen, Xiuquan Cao, Di Peng, Qingze Zuo & Guobin Zhou

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  1. Zhongbin Liu
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  2. Lin Chen
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  3. Xiuquan Cao
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Correspondence to Xiuquan Cao.

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Liu, Z., Chen, L., Cao, X. et al. Simulation study on the disaggregating mechanism of wet agglomerates in water-based drilling cuttings based on discrete element method. Comp. Part. Mech. 10, 615–625 (2023). https://doi.org/10.1007/s40571-022-00516-3

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