Abstract Alteration in the environmental conditions will cause a reversed reaction between o/w emulsion and w/o emulsion that has similar advantages of different liquids form on the reversible invert emulsion. The reversible phase inversion of the emulsion has a benefit of dealing with drilling cutting, so the reversible invert emulsion also can be thought used as a drilling fluid. The phase inversion from w/o emulsion to o/w emulsion can be divided into three stages. They are w/o emulsion, w/o/w emulsion, and o/w emulsion. In the w/o emulsion stage, the structure appeared among water droplets when the percentage of the HCl solution (5%) was less than 0.375%. In the w/o/w emulsion stage, the structure among water droplets existed at the beginning of this stage; however, the internal phase and the external phase can interchange their positions during the process. In the third stage, the structures among droplets of the emulsion would be broken and the degree of the dispersion of the oil droplet in the emulsion would increase. The changes in the microstructure, conductivity, electrical stability, standing stability, and the viscosity of the emulsion, which have edified among droplets in the process from w/o emulsion to o/w emulsion, were studied. The result of the microstructure microscopic observation agrees with the result of the electrical stability and viscosity experiments. Moreover, the internal phase and the external phase can interchange positions during the process.

中文翻译：

---

pH敏感型可逆反转乳液从w/o到o/w的转相机理

摘要 环境条件的改变会引起水包油乳液和水包油乳液之间的逆反应，在可逆反相乳液上具有不同液体形式的相似优点。乳液的可逆相转化有利于处理钻屑，因此可逆转化乳液也可作为钻井液使用。从w/o乳液到o/w乳液的相转化可分为三个阶段。它们是w/o乳液、w/o/w乳液和o/w乳液。在w/o乳液阶段，当HCl溶液(5%)的百分比小于0.375%时，水滴之间出现结构。在w/o/w乳液阶段，该阶段开始时存在水滴间结构；然而，在此过程中，内相和外相可以互换位置。在第三阶段，乳液液滴之间的结构将被破坏，油滴在乳液中的分散程度将增加。研究了在从w/o乳液到o/w乳液的过程中，液滴在微结构、电导率、电稳定性、静置稳定性和粘度方面的变化。微观结构显微观察结果与电稳定性和粘度实验结果一致。此外，内相和外相在此过程中可以互换位置。乳液液滴之间的结构会被破坏，油滴在乳液中的分散程度会增加。研究了在从w/o乳液到o/w乳液的过程中，液滴在微结构、电导率、电稳定性、静置稳定性和粘度方面的变化。微观结构显微观察结果与电稳定性和粘度实验结果一致。此外，内相和外相在此过程中可以互换位置。乳液液滴之间的结构会被破坏，油滴在乳液中的分散程度会增加。研究了在从w/o乳液到o/w乳液的过程中，液滴在微结构、电导率、电稳定性、静置稳定性和粘度方面的变化。微观结构显微观察结果与电稳定性和粘度实验结果一致。此外，内相和外相在此过程中可以互换位置。被研究。微观结构显微观察结果与电稳定性和粘度实验结果一致。此外，内相和外相在此过程中可以互换位置。被研究。微观结构显微观察结果与电稳定性和粘度实验结果一致。此外，内相和外相在此过程中可以互换位置。