钻探工程2026，Vol.53Issue(1)：59-65,7.DOI:10.12143/j.ztgc.2026.01.009
硬地层牙轮钻头破岩特性数值模拟研究
Numerical simulation of rock-breaking characteristics of tri-cone bit in hard formations
摘要
Abstract
To address the engineering challenges of frequent failure and short service life of roller cone bits in hard formation drilling,this study established a nonlinear contact dynamic model between the bit and rock based on field drilling data.The Drucker-Prager criterion was adopted to describe the elastoplastic behavior of the rock.The rock-breaking process of a tri-cone bit under the coupled effects of weight on bit(WOB)and rotary speed was simulated using the finite element software ABAQUS.The results indicate that rock breakage is primarily achieved through impact and shear,with the induced tensile stress being the dominant factor in rock failure.Pronounced longitudinal and torsional vibrations occur during the rock-breaking process,and the resulting transient impacts are the root cause of accelerated tooth wear and bearing failure.This conclusion is consistent with field failure cases.The research reveals the failure mechanism of roller cone bits in hard formations and proposes recommendations such as preferentially selecting wear-resistant bits,installing shock absorbers,and optimizing drilling parameters.These findings provide important theoretical guidance and practical value for enhancing drilling efficiency in deep hard formations and reducing engineering costs.关键词
牙轮钻头/硬地层/岩石破碎/数值模拟/有限元法/动态特性/地热钻井Key words
tri-cone bit/hard formation/rock fragmentation/numerical simulation/finite element method/dynamic characteristics/geothermal drilling分类
能源科技引用本文复制引用
赵子栋,宋永朋,刘航铭,张所邦,许志新..硬地层牙轮钻头破岩特性数值模拟研究[J].钻探工程,2026,53(1):59-65,7.基金项目
湖北省地质局项目"页岩气水平井旋转扶正防托压钻具组合力学模型与设计软件开发"(编号:42000025622T000000169) （编号:42000025622T000000169）
湖北省地质勘查基金项目"湖北利川—忠路地区二叠系页岩气远景区调查"(编号:[2024]1) （编号:[2024]1）
