Lubricating agent for relieving backing pressure problem in drilling process for drilling as well as preparation method and application of lubricating agent

The invention belongs to the technical field of hydrogeological drilling, and particularly relates to a lubricant for relieving the backing pressure problem in the drilling process for drilling as well as a preparation method and application of the lubricant. The lubricant for relieving the backing pressure problem in the drilling process for drilling comprises the following components: water, ionic membrane sodium hydroxide, modified asphalt and a graphite solid lubricant in a weight ratio of 3500: (2-4): (900-1100): (450-550). The lubricant for relieving the backing pressure problem in the drilling process for drilling can achieve the same lubricating effect as an FKRH lubricant, the backing pressure problem can be relieved, the drilling efficiency is improved, and the construction cost is reduced. 本发明属于水文地质钻探技术领域，具体涉及一种钻探用缓解钻进过程中托压问题的润滑剂及其制备方法和应用。钻探用缓解钻进过程中托压问题的润滑剂包括以下重量比的各组分：水：离子膜氢氧化钠：改性沥青：石墨类固体润滑剂＝3500:(2-4):(900-1100):(450-550)。本发明所提供的钻探用缓解钻进过程中托压问题的润滑剂可达到与FKRH润滑剂一样的润滑效果，可以缓解托压问题，增加钻进效率，降低施工成本。