水溶性纤维素类钻井液处理剂制备与应用进展

Preparation and Application Progress of Water-soluble Cellulose Additives for Drilling Fluid

在改性天然材料钻井液处理剂中,水溶纤维素类产品是应用最早、应用面最广和用量最大的钻井液处理剂之一。水溶性纤维素产品主要以羧甲基纤维素为主,根据其聚合度和粘度的不同,在钻井液中分别起到增粘、提高泥浆的悬浮性,降低滤失量和改善泥饼质量等作用,可以用于淡水、盐水、海水和无粘土相钻井液。此外,水溶性纤维素还有聚阴离子纤维素、羟乙(丙)基纤维素和接枝改性纤维素,其中,聚阴离子纤维素是在羧甲基纤维素的基础上,通过优化工艺而制得的取代度均匀的水溶性纤维素产品,在泥浆中具有更好的增粘、降滤失和防塌抑制效果。

Though the water-soluble cellulose,used as a earliest treatment agent for drilling fluid in largest amount,can be used for all types of water-borne drilling fluid but it has disadvantage of poor temperature-resistance.Based on the introduction of primary structure and properties of cellulose,the modification methods of cellulose,as well as the performances,production processes and applications of water-soluble carboxymethyl cellulose,polyanionic cellulose,hydroxyethylcellulose and graft-modified cellulose and so on were detailedly introduced.