Volume 35 Issue 6
Nov.  2018
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2018  >  35(6): 27-30
Guo Jianmei, Zhou Jian, Lu Fuwei, Li Yiqiang, Wang Weizhong, Huang Chen, Tian Zengyan, Kong Ying. Simulation of Adsorption of Lubricant Base Oil on the Surface of Drilling Tools[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(6): 27-30. doi: 10.3969/j.issn.1001-5620.2018.06.005
Citation: Guo Jianmei, Zhou Jian, Lu Fuwei, Li Yiqiang, Wang Weizhong, Huang Chen, Tian Zengyan, Kong Ying. Simulation of Adsorption of Lubricant Base Oil on the Surface of Drilling Tools[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(6): 27-30. doi: 10.3969/j.issn.1001-5620.2018.06.005
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Simulation of Adsorption of Lubricant Base Oil on the Surface of Drilling Tools

doi: 10.3969/j.issn.1001-5620.2018.06.005

  • 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

  • Received Date: 2018-08-15
  • Publish Date: 2018-11-30
    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.

     

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