凹凸棒石是一种较为少见的粘土,是国内近年发现并开始研究的。凹凸棒石粘土有天然惰性,其阳离子交换量低(约为20～30毫克当量/100克土),且在350℃～400℃温度下晶体结构不变,所以在盐水中不会被电解质所絮凝,具有抗高温性能。近年来,海上钻井引进的泥浆材料很多,其中凹凸棒石作为抗盐粘土,在我国海洋钻井中得到广泛应用。为了开 Attapulgite is a relatively rare clay, is found in recent years and began to study. Attapulgite clay is naturally inert with a low cation exchange capacity (about 20 to 30 meq / 100 g of soil) and its crystal structure does not change at a temperature of 350 ° C to 400 ° C, so it is not affected by electrolytes Flocculation, with high temperature performance. In recent years, there are many mud materials introduced in offshore drilling, of which attapulgite is widely used as salt-resistant clay in marine drilling in China. To open