摘要：The characteristics of conglomerate non-uniformity and complex pore structure lead to severe wear and low rock-breaking efficiency of PDC bits when drilling into conglomerate formations. In this paper, the characteristics of breaking conglomerate of three kinds of PDC cutters such as planar cutter, triple-ridged cutter and axe-shaped cutter are studied under high confining pressure. By designing and carrying out experiments of breaking conglomerate with the planar cutter, axe-shaped cutter and triple-ridged cutter under high confining pressure, the characteristics of cutting force, rock breaking volume, MSE of rock breaking and distribution of cuttings of PDC fractured conglomerate, and the surface topography of the cutting groove of PDC fractured conglomerate are compared. The experimental results show that the cutting force of the triple-ridged cutter is the most stable and the mechanical specific energy of the axe-shaped cutter is the least under the condition of high confining pressure. In addition, the grooving boundary of the triple-ridged cutter is more obvious, and the ability of triple-ridged cutter to peel the whole gravel is stronger under the condition of large cutting depth. In the design of PDC bits in conglomerate formations, the triple-ridged cutter can be selected as the front cutter of the nose and shoulder. The research provides theoretical support for the cutter selection design of hybrid-cutters PDC bit in conglomerate formation to improve rock breaking efficiency and lifespan of conglomerate formation drilling. Copyright 2024 ARMA, American Rock Mechanics Association.

ISSN号：/

卷、期、页：58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024, 2024

发表日期：2024-06-23

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）

发表期刊名称：58th US Rock Mechanics / Geomechanics Symposium

参与作者：Chen, Xiaoyuan,Wang, Wei

通讯作者：李欣龙,陈晗,陈振良

第一作者：赫文豪,黄中伟,史怀忠,熊超

论文类型：会议论文

论文概要：Chen, Xiaoyuan,李欣龙,赫文豪,Wang, Wei,黄中伟,史怀忠,熊超,陈晗,陈振良，Experimental Study on Rock-Breaking Characteristics of Conglomerate with Special-shaped PDC Cutters under High Confining Pressure，58th US Rock Mechanics / Geomechanics Symposium，2024，58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024, 2024

论文题目：Experimental Study on Rock-Breaking Characteristics of Conglomerate with Special-shaped PDC Cutters under High Confining Pressure