凸棱非平面聚晶金刚石齿的破岩机理及在含砾地层中的应用

doi:10.3969/j.issn.1004-132X.2024.02.022

摘要/Abstract

摘要： 为提高聚晶金刚石复合片（PDC）钻头在含砾、软硬交错等不均质地层中的抗冲击性能，开展了凸棱非平面PDC齿的研究。通过仿真和室内实验对比分析了凸棱非平面齿与常规平面齿的破岩机理。与平面齿相比，凸棱非平面齿与岩石的接触应力分布更均匀，切削破岩过程中的载荷波动幅度明显更小，切削稳定性更高。凸棱齿特殊的非平面结构改变了切削齿与岩石的互作用方式，在不均质地层得到成功应用。

关键词: 非平面聚晶金刚石齿, 含砾地层, 破岩机理, 冲击损坏

Abstract: A study of convex non-planar PDC cutter was conducted to improve the impact resistance of PDC bits in gravel-bearing, soft-hard interlaced, and other inhomogeneous formations. By comparing simulation and laboratory experiments, the mechanism of rock breaking between convex non-planar cutter and conventional planar cutter was investigated. Compared to planar cutter, the contact stress generated by cutting rock with convex non-planar cutter is more uniform on the cutter, the load fluctuation during the cutting processes is significantly smaller, and the cutting stability is higher. The special non-planar structure of the cutter changes the interaction mode between the cutting cutter and the rock, and is successfully applied in heterogeneous formations.

Key words: non-planar polycrystalline diamond compact(PDC) gear teeth bit, gravel-bearing formation, mechanism of rock breaking, impact damage

中图分类号:

TE242

陈炼, 魏小虎, 曹强, 周岩, 杨迎新, 胡川, 赵志杰, 伍彬. 凸棱非平面聚晶金刚石齿的破岩机理及在含砾地层中的应用[J]. 中国机械工程, 2024, 35(02): 371-379.

CHEN Lian, WEI Xiaohu, CAO Qiang, ZHOU Yan, YANG Yingxin, HU Chuan, ZHAO Zhijie, WU Bin. Mechanism of Rock Breaking by Convex Non-planar PDC Cutter and Its Applications in Gravel-bearing Formation[J]. China Mechanical Engineering, 2024, 35(02): 371-379.

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