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由于钻探工艺的特殊性，作为钻探润滑剂，对表面活性剂应有所选择。一、具备什么样条件的表面活性剂才适合作为钻探润滑剂。根据润滑的不同状态，可分为流体润滑、边界润滑和极压润滑。岩心钻中广泛采用水基润滑液作为钻杆和岩石间的润滑介质，属边界润滑范畴。水基润滑液是由于表面活性剂向摩擦面吸附，形成定向排列的分子膜而具有润滑性。可见，只要表面活性剂能牢牢地吸附在钻杆的表面，就会起到良好的润滑作用。根据浮选理论，只有表面活性剂分子中的亲水基能与钻杆表面Fe~(2+)（Fe~(3+)）产生化学反应，生成难溶有机铁盐时，才能产生牢固的吸附。
Due to the particularity of the drilling process, surfactant should be chosen as a drilling lubricant. First, what kind of conditions have the surfactant is suitable as a drilling lubricant. Depending on the lubrication of the state, can be divided into fluid lubrication, boundary lubrication and extreme pressure lubrication. Core drill widely used in water-based lubricating liquid as a lubricant between the drill pipe and the rock, is a boundary lubrication category. Water-based lubricating fluid is due to surfactant adsorption to the friction surface, the formation of aligned molecular film and has lubricity. Visible, as long as the surfactant can be firmly adsorbed on the surface of the drill pipe, it will play a good lubricating effect. According to the flotation theory, only hydrophilic molecules in the surfactant molecule can react chemically with Fe ~ (2 +) (Fe ~ (3+)) on the surface of the drill rod to form strong insoluble organic iron salts Adsorption.