聚阴离子纤维素（PAC）

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　聚阴离子纤维素是一种高品质水溶性纤维素衍生物，其商业产品分为两种：PAC-L和PAC-H，皆可有效的提高水基钻井液，其中包括淡水、海水和饱和盐水钻井液的年度并降低滤失量，但PAC-L没有PAC-H那么强的增稠效应，PAC的一般加量为0.2%～0.6%。

PAC PAC-polyanionic cellulosic polymer is a high quality water soluble cellulose derivative.The commercial products of PAC can be divided into two categories，PAC-L and PAC-H. Both of them can effectively enhance viscosity and reduce fluid loss in water base drilling fluid inclusive saturated salt water drilling fluid system provided。 PAC-L has lesser viscosifying effect than PAC-H. The common dosage of PAC is in the range of 0.2%～0.6%.

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聚丙烯腈铵盐 NH4-HPAN