摘要：Polycrystalline diamond compact (PDC) bits have been widely used in drilling of soft to medium-hard rock formations. A rational layout or arrangement of PDC cutters on the bits can significantly contribute to enhanced rock-breaking efficiency. In this study, a rock breaking experimental scheme of PDC cutters was designed for testing different cutter placement methods, and the characteristics and mechanisms of rock breaking of the PDC bits were investigated by measuring the cutting force, the shape and size of rock cuttings, the morphology of cutting grooves and the characteristics of rock micro-fragmentation. The experimental results indicate that reasonable cutter height and cutter distribution density can reduce the specific energy of rock-breaking and improve the rock breaking efficiency. The cutting depth can affect the distribution of microcracks on groove surface and the thickness of the microcracks layer at the bottom of the grooves. A boundary effect can be generated in a crack damage zone, which can effectively promote rock breaking. ? 2024 University of Petroleum, China. All rights reserved.

ISSN号：1673-5005

卷、期、页：v 48,n 5,p83-90

发表日期：2024-10-01

收录情况：EI（工程索引）

发表期刊名称：Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science)

通讯作者：陈晗,李欣龙,陈振良,代献伟,史明豪

第一作者：史怀忠,赫文豪,熊超

论文类型：期刊论文

论文概要：陈晗,李欣龙,史怀忠,陈振良,赫文豪,代献伟,熊超,史明豪，Rock breaking characteristics under different cutter arrangements on PDC bits，Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science)，2024，v 48,n 5,p83-90

论文题目：Rock breaking characteristics under different cutter arrangements on PDC bits