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（４）其他常规稳定剂，如季铰盐型阳离子表面活性剂和非离子表面活性剂加膨润土制得的水基乳化钻井液稳定剂和纤维素，在４５℃下用ＮａＯＨ进行初始碱解，冷却后在硫酸钠存在下，用一氯醋酸钠使之烷基化而制得的适合作钻井液稳定剂的羧甲基纤维素、羧甲基纤维素加浮选剂Ｔ－
(4) other conventional stabilizers, such as quaternary ammonium salts of cationic surfactants and nonionic surfactants made of bentonite and water-based emulsion drilling fluid stabilizer and cellulose, NaOH at 45 ℃ initial alkaline hydrolysis, After cooling in the presence of sodium sulfate, with sodium monochloroacetate alkylation made of a suitable drilling fluid stabilizer of carboxymethyl cellulose, carboxymethyl cellulose and flotation agent T-