钻井液中氯离子浓度对N80石油套管钢摩擦磨损性能的影响
Effect of Chloride Ion Concentration in Drilling Fluid on Friction and Wear Properties of N80 Oil Casing Steel
摘 要
在不同氯离子浓度（0，0.34，0.68，1.02 mol·L-1）的水基钻井液中对N80石油套管钢盘试样与G105钻杆钢销试样进行销-盘摩擦磨损试验，研究了氯离子浓度对N80钢摩擦磨损性能的影响。结果表明：随着氯离子浓度的增加，N80钢的磨损率和销-盘摩擦副的摩擦因数均先增加后减小，且都在氯离子浓度为0.68 mol·L-1时最高，分别为2.2×10-6 mm3·N-1·m-1和0.85；在不含氯离子的钻井液中摩擦磨损时，N80钢主要发生磨粒磨损，含有氯离子时则发生腐蚀-磨粒磨损；氯离子会破坏N80钢表面氧化膜，增大表面粗糙度，从而提高磨损率，但当氯离子浓度高至1.02 mol·L-1时，氧化膜被完全破坏，表面粗糙度下降，磨损率又降低。
N80钢
氯离子浓度
水基钻井液
磨损行为
oil casing
N80 steel
chloride ion concentration
water-based drilling fluid
wear behavior
Abstract
Pin-on-disk friction and wear tests were conducted on N80 oil casing steel disc sample and G105 drill pipe steel pin sample in water-based drilling fluids with different chloride ion concentrations (0, 0.34, 0.68, 1.02 mol·L-1). The effect of chloride ion concentration on friction and wear properties of N80 steel were investigated. The results show that with increasing chloride ion concentration, the wear rate of N80 steel and the friction coefficient of pin-disc friction pair increased first and then decreased, and both reached the highest values with chloride ion concentration of 0.68 mol·L-1, which were 2.2×10-6 mm3·N-1·m-1 and 0.85, respectively. During friction and wear in the drilling fluid without chloride ions, abrasive wear mainly occurred in N80 steel; with chloride ions, corrosion-abrasive wear occurred. The chloride ions could destroy the oxidation layer on surface of N80 steel, improving the surface roughness, thereby increasing the wear rate. When the concentration of chloride ions was as high as 1.02 mol·L-1, the oxidation layer was completely destroyed, making the surface roughness decrease, thereby reducing the wear rate.
中图分类号 TG156 DOI 10.11973/jxgccl202301012
所属栏目 材料性能及应用
基金项目 中国石油科技创新基金资助项目（2020D-5007-0210）；四川省重点研发项目（21ZDYF3109；21SYSX0054）
收稿日期 2021/11/16
修改稿日期 2022/9/30
网络出版日期
作者单位点击查看
备注李喜成(1973-),男,湖北荆州人,高级工程师,学士
引用该论文: LI Xicheng,TANG Xizhi,XUE Jibiao,ZHAN Ning,ZHANG Pengxiang. Effect of Chloride Ion Concentration in Drilling Fluid on Friction and Wear Properties of N80 Oil Casing Steel[J]. Materials for mechancial engineering, 2023, 47(1): 81～85
李喜成,唐习之,薛继彪,詹宁,张鹏翔. 钻井液中氯离子浓度对N80石油套管钢摩擦磨损性能的影响[J]. 机械工程材料, 2023, 47(1): 81～85
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【5】LIU Q Y, MAO L J, ZHOU S W.Effects of chloride content on CO2 corrosion of carbon steel in simulated oil and gas well environments[J].Corrosion Science, 2014, 84:165-171.
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