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松脂皂系阴离子钠皂型表面活性剂。是由松香、氢氧化钠、水、OP—10经加热皂化制成的软皂。其主要技术性能：表面张力44.05达因/厘米；摩擦系数0.147；pH值8.1。松脂皂具有成本低、料源广、配制简便、润滑、稳定性较好的优点。实践证明，用此种软皂做冲洗液，具明显减摩、减阻、减震、提高钻进效率、减少钻头磨损等作用。它主要运用于非碳酸岩类地层。若在硬水及碳酸岩类地层中使用时，需加入3—5％的OP—10或改用复合型松脂皂，以防破乳。
Rosin soap anionic sodium soap type surfactant. Soft soap made from rosin, sodium hydroxide, water, OP-10 by heating saponification. Its main technical performance: surface tension 44.05 dyne / cm; friction coefficient 0.147; pH value of 8.1. Rosin soap with low cost, wide source of material, preparation is simple, lubrication, good stability advantages. Practice has proved that with such soft soap do rinse, with significant anti-friction, drag reduction, shock absorption, improve drilling efficiency, reduce bit wear and other effects. It is mainly used in non-carbonate rock formation. If used in hard water and carbonate rock formations, 3-5% OP-10 or composite rosin soap should be added to prevent demulsification.