天然高分子降滤失剂是利用天然淀粉、纤维素等天然材料经特殊工艺加工而成的一种降滤失剂。该产品不仅具有良好的热稳定性、降滤失性能、抗盐、抗钙能力，可应用于淡水、盐水和海水钻井液，在钻井液中基本不增粘，较好的抗温能力，抗温达140·C，而且具有一定的降切力作用，无毒，有利于环保，是钻井液完井液中优良的降滤失剂。
       Natural polymer fluid loss reducer is a kind of fluid loss reducer made of natural starch, cellulose and other natural materials by special processing technology. The product not only has good thermal stability, filtrate loss reduction, salt resistance and calcium resistance, but also can be used in fresh water, salt water and seawater drilling fluids, moreover, it has the function of reducing Shear Force, is non-toxic, is beneficial to environmental protection, and is an excellent fluid loss reducer in drilling fluid and completion fluid.