Mr. Jianlin Yao Profile

Jianlin Yao

at CCDC Petroleum Drilling & Production Technology Co

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Proceedings Article | 10 November 2022 Paper

Quantitative study on rock breaking effect of cutters of annular groove PDC bit

Jianlin Yao, Shenglin Fan, Kesong Tang

Proceedings Volume 12331, 123312Q (2022) https://doi.org/10.1117/12.2652869

KEYWORDS: Teeth, 3D modeling, Statistical modeling, Energy efficiency, Numerical simulations, Data acquisition, Statistical analysis, Reliability, Data modeling

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Aiming at a new type of annular groove PDC bit, the law of scraping rock breaking efficiency of the cutter is studied in this paper. The three-dimensional simulation model of dynamic rock breaking of the cutter under two conditions of flat rock sample and rock ridge rock sample is established by finite element method. The variation laws of rock breaking efficiency, contact pressure and load on the cutter in the process of rock breaking are studied. The rock breaking experiment of the cutter scraping on sandstone ridge is carried out, and the influence trend of load in cutting and the destruction specific energy is analyzed. The results show that the rock breaking efficiency of the cutter is higher than that of flat rock samples, and the side angle has a great influence on the load in cutting and the destruction specific energy of the cutter. With the increase of rake angle, the destruction specific energy of the cutter first decreases and then increases, and there is also an optimal rake angle. With the increase of intrusion depth, the destruction specific energy of the cutter gradually decreases and the load in cutting gradually increases.

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