本产品是碳酸钙的一个分类，分子式为CaCO3，是一种酸溶性堵漏剂。它具有含量纯度高，白度高、粒径均匀，是钻井液中一种多级、优良的堵漏滤失剂。
       This product is a kind of calcium carbonate. The formula is CaCO3. It is an acid-soluble sealing agent. It has a high content of purity, whiteness, uniform particle size. It is a multi-level, excellent sealing fluid loss agent.