Rui 13A is a green mine brine-mining docking well with one-in-two-out or two-in-one-out brine mining method. The designed well depth is 1138.3m， and the actual drilling depth is 1285m. The main strata are Cenozoic Guanzhuang Formation， Fengxian Formation and Paleogene， and the main lithology is fine sandstone and marl mainly cemented by siltstone， mudstone and argillaceous. There is a set of sedimentary rock series containing salt minerals. The rock types are mainly chloride rock， sulfate rock （anhydrite， glauberite）， carbonate rock （dolomite）， argillaceous rock and siltstone. In the construction process， there are complex problems such as collapse， falling blocks， and the formation with large friction resistance is easy to shrink in diameter. YZ （high-efficiency inhibitor）， RH （high-efficiency lubricant）， etc. With the adjustment of density， a saturated brine strong anti-slump flushing fluid system was formed. The fluid loss is≤5 mL， the rheological performance and the anti-slump inhibition effect are good. It has achieved good application results on site， ensuring the smooth implementation of the project.