润滑剂基础油在钻具表面吸附模拟

郭剑梅; 周健; 卢福伟; 李义强; 王伟忠; 黄臣; 田增艳; 孔瑛

doi:10.3969/j.issn.1001-5620.2018.06.005

润滑剂基础油在钻具表面吸附模拟

doi: 10.3969/j.issn.1001-5620.2018.06.005

1. 渤海钻探泥浆技术服务有限公司, 天津 300280;
2. 长江大学化学与环境工程学院, 湖北荆州 434023;
3. 渤海钻探库尔勒分公司, 新疆库尔勒 841000;
4. 中国石油大学(华东)重质油国家重点实验室, 山东青岛 266580

基金项目:

中国石油天然气集团公司重点研究课题：井筒工作液新材料新体系基础研究（2016A-3903）。

详细信息

作者简介:
郭剑梅,高级工程师,1968年生,现在从事钻井液技术研究工作。电话13502081305;E-mail:njgsgjm@163.com

通讯作者:
卢福伟,电话(0716)8060442

中图分类号: TE254.4
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出版历程
- 收稿日期: 2018-08-15
- 刊出日期: 2018-11-30

Simulation of Adsorption of Lubricant Base Oil on the Surface of Drilling Tools

1. Drilling Fluids Technology Service Company of CNPC Bohai Drilling Engineering Company Limit., Tianjin 300280;
2. College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, Hubei 434023;
3. Korla Drilling Engineering Company. BHZT, Korla, Xinjiang 841000;
4. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266555

摘要

摘要: 采用分子模拟方法考察了3种润滑剂基础油在铁钻具表面的吸附行为。蒙特卡洛模拟结果表明：甘油三C18脂肪酸酯具有空间变形能力，在铁表面吸附能为-48.7352 kJ·mol^-1，吸附能为正构C18和C18脂肪酸甲酯两倍左右。动力学模拟结果表明：正构C18和C18脂肪酸甲酯在铁表面形成单分子层结构，油膜厚度约为0.35 nm；甘油三C18脂肪酸酯在铁表面吸附油膜厚度为1.5 nm左右。甘油三C18脂肪酸酯在铁钻具表面吸附能强，形成油膜厚，润滑能力优于正构C18和C18脂肪酸甲酯。
- 润滑剂 /
- 钻具 /
- 吸附 /
- 蒙特卡洛模拟 /
- 分子动力学模拟
Abstract: The adsorption behavior of three lubricant base oils on the surface of drilling tools (iron) has been studied with molecular simulation. Monte Carlo simulation results from the studies showed that triglyceride esters of C18 fatty acids have space deformation ability. The adsorption energy of triglyceride esters of C18 fatty acids on the surface of iron is -48.7352 kJ/mol, about two times of the adsorption energy of n-stearic acid methyl ester and of stearic acid methyl esters. Dynamic simulation results showed that n-stearic acid methyl ester and stearic acid methyl esters form a monomolecular layer on the surface of iron, the thickness of which is ca. 0.35 nm. The thickness of the film formed by triglyceride esters of C18 fatty acids on the surface of iron is ca. 1.5 nm. Triglyceride esters of C18 fatty acids have high adsorption energies on the surface of iron, and are able to form thick oil films, meaning that they are superior to n-stearic acid methyl ester and stearic acid methyl esters as a lubricant.
- Lubricant /
- Drilling tool /
- Adsorption /
- Monte Carlo simulation /
- Molecular dynamics simulation

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参考文献(11)

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