The significance of improving the drilling productivity and reducing the cost and non-productive time of drilling process, substantially relies on the efficiency of drilling performance. This paper provides a comprehensive understanding of drilling process, aiming to predict drilling performance and investigate drilling parameters using a validated finite element (FE) model. Experimental validation of the FE model was achieved through testing on a laboratory drilling rig, ensuring the accuracy and reliability of the numerical simulations. To accurately capture the nonlinear characteristics of bit-rock interaction, the Riedel–Hiermaier–Thoma model was adopted as a material model, and its parameters were identified through a series of carefully conducted experimental tests. The numerical results obtained from the FE rock failure model during the compressive and tensile tests demonstrated a robust correlation with the experimental data. The verified material model was then employed into another FE drilling model to simulate rock breaking in an actual drilling scenario. This analysis sheds light on the impact of drill-bit interaction with the rock formation, providing valuable insights into its behaviour during drilling operations. The FE drilling model was further utilised in a parametric study to predict the effects of critical drilling parameters, like loading rate and rotary speed, on the weight on the bit, torque on the bit, and rate of penetration. Both the FE drilling and experimental results provided a significant consistency when the drilling parameters were compared, and nonlinear dynamic phenomena, such as stick–slip and bit-bouncing, were observed. By investigating these effects, this study contributes to optimising drilling operations, enabling better control of premature vibrations and enhancing drilling efficiency.

中文翻译：

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通过有限元和实验研究对多晶金刚石复合片钻头的钻井性能进行分析


提高钻井生产率、降低钻井过程成本和非生产时间的意义，很大程度上取决于钻井作业的效率。本文提供了对钻井过程的全面了解，旨在使用经过验证的有限元 (FE) 模型来预测钻井性能并研究钻井参数。通过实验室钻机测试实现了有限元模型的实验验证，保证了数值模拟的准确性和可靠性。为了准确捕捉钻头-岩石相互作用的非线性特征，采用Riedel-Hiermaier-Thoma模型作为材料模型，并通过一系列仔细进行的实验测试确定了其参数。在压缩和拉伸试验期间从有限元岩石破坏模型获得的数值结果证明了与实验数据的稳健相关性。然后将经过验证的材料模型应用于另一个有限元钻井模型中，以模拟实际钻井场景中的岩石破碎。该分析揭示了钻头与岩层相互作用的影响，为钻探作业期间岩层的行为提供了宝贵的见解。有限元钻井模型进一步用于参数研究，以预测关键钻井参数（如加载速率和转速）对钻头重量、钻头扭矩和钻速的影响。当比较钻井参数时，有限元钻井和实验结果都提供了显着的一致性，并且观察到了粘滑和钻头跳动等非线性动态现象。 通过研究这些影响，本研究有助于优化钻井作业，更好地控制过早振动并提高钻井效率。