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发明公开
CN102382245A 一种钻井液用抗高温聚合物类降滤失剂及其制备方法 有权

一种钻井液用抗高温聚合物类降滤失剂及其制备方法
摘要：
本发明涉及一种钻井液用抗高温聚合物类降滤失剂，其特征在于所述降滤失剂由25-85mol％的第一单体、10-35mol％的第二单体和1-40mol％的第三单体共聚而成，其中所述第一单体是具有磺酸基的烯烃单体及其盐；所述第二单体是具有氰基的烯烃单体；所述第三单体是具有侧链环状取代基的烯烃单体或丙烯酰胺及其衍生物的单体。本发明还涉及一种钻井液用抗高温聚合物类降滤失剂的制备方法及其用途。
摘要（英）：

The invention relates to a high temperature-resistant polymer filtrate reducer for drilling fluid. The filtrate reducer is characterized in that: 25 to 85 mol percent of first monomer, 10 to 35 mol percent of second monomer and 1 to 40 mol percent of third monomer are copolymerized to form the filtrate reducer, wherein the first monomer is olefin monomer with sulfonic acid group and salt thereof,the second monomer is olefin monomer with cyano-group, and the third monomer is olefin monomer or acrylamide with side-chain cyclic substituent and the monomer of derivative thereof. The invention also relates to a preparation method and application of the high temperature-resistant polymer filtrate reducer for drilling fluid.

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