Wang Minsheng, He Senlin, Xiong Chao, Wang Heng, Xuan Lingchao, Shi Huaizhong, Liao Hualin, Huang Zhongwei
Sinopec Key Laboratory of Ultra-Deep Well Drilling Engineering Technology, Beijing 100020, China.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China.
Rev Sci Instrum. 2024 Sep 1;95(9). doi: 10.1063/5.0224824.
To enhance the efficiency of the Stinger Polycrystalline Diamond Compact (PDC) cutter in breaking hard rocks, this study focuses on optimizing the cutter intrusion-cutting rock breaking parameters. A numerical calculation model for the rotational breaking of granite by a Stinger PDC cutter was established. A comprehensive statistical examination was performed to assess the influence of various factors on intrusion ability (IA), tangential force (TF), and mechanical specific energy (MSE). The Taguchi method was used to determine the optimal settings for each factor, while analysis of variance was employed to assess the significance and relative impact of these factors on the target outcomes. In addition, the multi-objective function was optimized using the gray relational analysis method. The primary process parameters obtained for the various performance characteristics are the cone top angle (α), the cone top radius (r), the cutter diameter (d), the cutter back inclination angle (β), and weight on bit (P). The impact ratios of these parameters are 6.20%, 7.66%, 3.93%, 17.20%, and 65.02%, respectively. The optimal geometrical parameters are α = 60°, r = 2 mm, and d = 15 mm, while the optimal working parameters are β = 30° and P = 800 N. In the optimal case, IA and MSE were reduced by 55.335% and 15.809%, respectively, compared to the initial case. Despite a 15.706% increase in TF, the overall GRG increased for all three evaluation criteria, with an overall increase in efficiency of 18.229%. The results of this paper can provide guidance for the design of Stinger cutter PDC drill bits.
为提高斯廷格聚晶金刚石复合片（PDC）刀具在硬岩破碎中的效率，本研究着重优化刀具侵入 - 切割破岩参数。建立了斯廷格PDC刀具旋转破碎花岗岩的数值计算模型。进行了全面的统计检验，以评估各种因素对侵入能力（IA）、切向力（TF）和机械比能（MSE）的影响。采用田口方法确定各因素的最佳设置，同时运用方差分析评估这些因素对目标结果的显著性和相对影响。此外，使用灰色关联分析方法对多目标函数进行了优化。针对各种性能特征获得的主要工艺参数为锥顶角（α）、锥顶半径（r）、刀具直径（d）、刀具后倾角（β）和钻压（P）。这些参数的影响比例分别为6.20%、7.66%、3.93%、17.20%和65.02%。最佳几何参数为α = 60°、r = 2毫米和d = 15毫米，而最佳工作参数为β = 30°和P = 800牛。在最佳情况下，与初始情况相比，IA和MSE分别降低了55.335%和15.809%。尽管TF增加了15.706%，但所有三个评估标准的总体灰色关联度均有所提高，效率总体提高了18.229%。本文的结果可为斯廷格刀具PDC钻头的设计提供指导。
