Environment-friendly lubricant as well as preparation method and application thereof

The environment-friendly lubricant provided by the invention is an environment-friendly lubricant containing oleic acid imidazoline, can form a stable adsorption film on a metal surface through N-containing heterocyclic rings and long-chain fatty acid chains based on oleic acid imidazoline, and has good extreme pressure, wear resistance and friction reduction performance. The lubricant provided by the invention is added into the drilling fluid, so that a remarkable lubricating effect can be obtained. The basic raw materials of the environment-friendly lubricant are all vegetable oil, and the environment-friendly lubricant is extremely low in biotoxicity, excellent in environment-friendly performance, simple in preparation method, capable of being widely applied and good in market prospect. 本发明提出了一种环保润滑剂，该润滑剂为含油酸咪唑啉的环保型润滑剂，通过基于油酸咪唑啉的含N杂环和长链脂肪酸链，能够在金属表面形成稳定的吸附膜，具有良好的极压、抗磨减摩性能。利用本发明的润滑剂添加至钻井液中，可获得显著的润滑效果。本发明的环保型润滑剂的基础原材料均为植物油，生物毒性极低，环保性能优良，制备方法简单，可广泛应用，市场前景良好。