HV-CMC属于高分子量羧甲基纤维素钠盐，为白色或浅黄色粉末，可直接加入各种水基钻井完井液中，一般加量为0.2%-0.5%。
       CMC-HV is a high-molecular-weight carboxymethyl cellulose sodium salt, white or pale yellow powder. It can be added directly to a variety of water-based drilling fluids and completion fluids. The general dosage is 0.2% -0.5%.