【摘要】 研究了用硝酸氧解褐煤，提高腐植酸含量，再通过碱抽提，磺甲基化及与丙烯腈接枝共聚等方法合成了具有杭高温、抗盐和降滤失作用的石油钻井液助剂．并对其抗盐、抗钙、抗高温、抑制水化及降滤失作用等性能的测试与现有产品对比，数据显示ＳＨＫ－ＡＮ助剂具有优良的性能，适合于各种水基石油钻井液体系，而且价格低廉，具有广阔的市场．更多还原

【Abstract】 This article is mainly about the synthesis technology of producing a filtrating loss reducing agent which is both anti-high temperature and anti-salt, by processing the brown coal with the methods of nitric acid oxidizing resolution, alkali extraction, methyl sulfonate graft copolym erization with acrylonitrile, as well as about its functions of anti-high temperature, anti-Ca, anti-salt and loss -filtrating reducing, etc.更多还原