井眼摩擦系数影响因素及规律实验研究

doi:10.11885/j.issn.1674-5086.2023.11.24.32

西南石油大学学报(自然科学版) ›› 2026, Vol. 48 ›› Issue (2): 162-171.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

敬俊^1,2, 方浩宇¹, 单鸿斌³, 祝效华^1,2, 倪宗清¹

1. 西南石油大学机电工程学院, 四川成都 610500;
2. 四川省油气设备技术共享与服务平台, 四川成都 610500;
3. 中国石油西南油气田公司工程技术研究院, 四川成都 610056

收稿日期:2023-11-24 发布日期:2026-04-30
通讯作者: 敬俊，E-mail:gjpmy@163.com
作者简介:敬俊，1986年生，男，汉族，四川绵阳人，副教授，博士，主要从事钻井提速工具、机电一体化井下智能作业装备、井筒完整性及风险评价方面的研究工作。E-mail:gjpmy@163.com
方浩宇，1998年生，男，汉族，四川成都人，硕士研究生，主要从事钻井提速工具以及地热能开发与利用方面的研究。E-mail:957787360@qq.com
单鸿斌，1997年生，男，汉族，辽宁大连人，硕士，主要从事井筒完整性、管柱力学等科研工作。E-mail:shb09@petrochina.com.cn
祝效华，1978年生，男，汉族，山东菏泽人，博士研究生导师，主要从事机械设计及理论、钻井提速理论与方法、管柱力学等方面的研究。E-mail:Zxhth113@163.com
倪宗清，2000年生，男，汉族，四川攀枝花人，硕士研究生，主要从事钻井提速工具、机电一体化井下智能作业装备等方面的研究。E-mail:516411194@qq.com
基金资助:
国家自然科学基金青年项目（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）；西南石油大学科研启动项目（2019QHZ008）

Experimental Study on Influence Factors and Laws of Borehole Friction Coefficient

JING Jun^1,2, FANG Haoyu¹, SHAN Hongbin³, ZHU Xiaohua^1,2, NI Zongqing¹

1. School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province, Chengdu, Sichuan 610500, China;
3. China Petroleum Southwest Oil and Gas Field Engineering Technology Research Institute, Chengdu, Sichuan 610056, China

Received:2023-11-24 Published:2026-04-30

摘要/Abstract

摘要： 井眼摩擦系数是计算钻进摩阻的关键参数，现多利用钻压、大钩钩载等数据反算获得某长度井段的等效摩擦系数，并以此为基础开展钻进摩阻的相关研究工作，缺少从摩擦发生机理、细观结构和润滑介质等方面，对钻井过程中“钻柱井壁”摩擦副的摩擦系数影响因素及其表现规律展开深入、细致的研究。通过建立摩擦室内实验平台，以井眼环境中摩擦影响关键因素——流体介质和岩屑形成的混合“润滑介质”为对象，开展不同工艺（气体钻井、钻井液钻井）井眼（裸眼岩石段、套管段）条件下，岩屑粒径、岩性和岩屑成床形态对摩擦系数影响规律的实验研究。研究结果表明，岩屑的几何不规则特性随粒径的增加而不断凸显，成为控制摩擦系数变化的主要因素；相比岩石粗糙壁面微凸结构明显的阻碍作用，内壁光滑的套管段摩擦系数整体偏小，因此为减小摩阻，应尽量提高裸眼段井眼质量；成床岩屑会对钻杆产生明显的“包覆效应”，导致摩擦系数增大；气体钻井条件下，钻柱与井壁的摩擦系数为0.44～0.58，钻井液钻井条件下，套管段摩擦系数为0.25～0.45，裸眼段摩擦系数为0.35～0.55。

关键词: 摩擦系数, 摩阻, 岩屑, 钻井液, 润滑介质

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.

Key words: friction coefficient, friction resistance, cuttings, drilling fluid, lubricating medium

中图分类号:

TE242

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.

JING Jun, FANG Haoyu, SHAN Hongbin, ZHU Xiaohua, NI Zongqing. Experimental Study on Influence Factors and Laws of Borehole Friction Coefficient[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2026, 48(2): 162-171.

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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

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