西南石油大学学报（自然科学版）2026，Vol.48Issue(2)：162-171,10.DOI:10.11885/j.issn.1674-5086.2023.11.24.32
井眼摩擦系数影响因素及规律实验研究
Experimental Study on Influence Factors and Laws of Borehole Friction Coefficient
摘要
Abstract
Friction coefficient is a key parameter in calculating the drag force when drilling and is obtained by back-calculation based on the data such as weight on bit and hook load,enabling studies on torque and drag.However,few studies have deeply investigated the influencing factors and variation patterns of the friction coefficient between the drillstring and borehole from the perspectives of friction mechanism,microstructure,and the mixed lubricating medium.To address this issue,a friction experimental platform is built and the studies on the influences of drilling technologies(gas drilling and mud drilling),borehole condition(casing and rock borehole)and the diameter,characteristic and distribution pattern of cuttings are made.The research shows that the geometric irregularity of cuttings becomes more pronounced with increasing particle size,serving as the primary factor controlling friction coefficient variations.Compared to the rough surface of borehole rock,the friction coefficient of casing is much lower,suggesting that improving open-hole quality can reduce drag.Additionally,the envelop effect of cuttings bed significantly increases the friction coefficient.The friction coefficient value is within the range of 0.44∼0.58 when gas drilling and it is 0.25∼0.45 in casing,0.35∼0.55 in borehole rock when mud drilling.关键词
摩擦系数/摩阻/岩屑/钻井液/润滑介质Key words
friction coefficient/friction resistance/cuttings/drilling fluid/lubricating medium分类
能源科技引用本文复制引用
敬俊,方浩宇,单鸿斌,祝效华,倪宗清..井眼摩擦系数影响因素及规律实验研究[J].西南石油大学学报（自然科学版）,2026,48(2):162-171,10.基金项目
国家自然科学基金青年项目(52004230) （52004230）
西南石油大学油气藏地质与开发全国重点实验室开放基金(PLN201921) （PLN201921）
西南石油大学科研启动项目(2019QHZ008) （2019QHZ008）
