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Journal of Spectroscopy
Volume 2013, Article ID 269280, 7 pages
Research Article

Effect of Nitric Acid on the Low Fluorescing Performance of Drilling Fluid Lubricant Based Animal and Vegetable Oils

1School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
2Beijing Institute of Exploration Engineering, Beijing 100083, China
3Tabei Exploratory & Development Department, PetroChina Tarim Oilfield Company, Korla 841000, China
4Drilling Fluid Technology Service Company, CNPC Bohai Drilling Engineering Ltd., Tianjin 300280, China

Received 5 September 2013; Accepted 21 October 2013

Academic Editor: Yizhuang Xu

Copyright © 2013 Feng-shan Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


After synthesis of mixed fatty acid triethanolamine ester surfactant based on animal and vegetable mixed oils, the reaction solution was added into 4% (wt/wt) liquid nitric acid or 9% (wt/wt) solid nitric acid as eliminating fluorescent agent continuing to react from 1 to 2 hours. The low fluorescence lubricant named E167 for drilling fluid was prepared, in which maximum fluorescence intensity ( ) was less than 10 in three-dimensional fluorescence spectra of excitation wavelength range. When the E167 was added into fresh water based drilling fluid at the dosage of 0.5% (wt/wt), the sticking coefficient reduced rate ( ) is 78% and the extreme pressure (E-P) friction coefficient reduced rate ( ) is 79%. In the case of 4% brine mud with 0.5% (wt/wt) E167 in it, the and are 75% and 62%, respectively. After the hot rolling ageing test 180°C × 16 h with the E167 was added into fresh water based drilling fluid at the dosage of 1% (wt/wt), the and are greater than 70%, which shows a much better lubrication properties of strong resistance to high temperature. The fresh water based drilling fluid which contains 1% (wt/wt) E167 is almost nonfoaming even after hot rolling ageing 120°C × 16 h.