一种改进型SPNH降滤失剂

Modified filtrate reducer G-SPNH

G-SPNH是以褐煤、腈纶废丝为主要原料,采用接枝共聚和磺化法制得的一种含羟基、羰基、亚甲基、磺酸基、苯环、羧基和腈基的水基钻井液降滤失剂。对G-SPNH在淡水钻井液中的性能及其抗温、抗盐、热稳定性进行了评价。研究表明,G-SPNH具有降滤失、降粘、抗高温(200℃以上)、抗盐(Cl^-达110g/L以上)、热稳定性好等特点,其作用明显优于同类磺化处理剂,能完全代替同类磺化处理剂。G-SPNH成本低,原料来源广,有一定的推广价值。

G-SPNH copolymerized from lignite and nitrilon is a filtrate reducer used in water base mud. Filtrate reducer G-SPNH contain hydroxy, carboxide, methy-lene, sulfo group, benzene ring, carboxyl andnitrile grouping in it. The properties of G-SPNH used in fresh water mud are evaluated. Test indicate that G-SPNH possesses good filtrate reducing property, viscosity reducing property, temperature tolerance (above 200℃),salt resistance(Cl resistance up to 110 g/L) and low cost.