Carboxymethyl cellulose (CMC) as a thickener has been widely used in industry, in oil drilling mud treatment is an important agent for drilling and well completion and cementing, etc., from thickening, fluid loss, gelling, suspending and so on. By expanding the sub-field of oil exploration drilling and increasing the average depth of the CMC's quality requirements continue to increase, requiring CMC has a high viscosity, salt tolerance, resistance to calcium and temperature resistance. In improving the quality of foreign CMC, using cellulose crushed, sealing with nitrogen gas, to increase the ratio of solvent solution, addition of antioxidants and other methods, to achieve a high degree of polymerization, high degree of substitution and a high uniformity of distribution of substituents purpose, such as is called CMC upgrading polyanionic cellulose (APc) to have good resistance
Salt resistance, calcium resistance, temperature resistance and high viscosity of the solution. China has conducted research in this area pre-production, but limited to the domestic conditions of the existing equipment, the majority of the oil grade CMC plant production levels and product quality with similar foreign products is still a large gap. MCC factors improve the quality of products are many, this article attempts to craft micro-crosslinked sodium tetraborate, research crosslinking mechanism and salt, acid substitution effect on the CMC and the viscosity, the base distribution, for the preparation of highly viscous salt tolerance CMC provides theoretical and experimental basis.