【摘要】 考察了羧甲基纤维素接枝丙烯酰胺／ 二甲基二烯丙基氯化铵共聚物（ Ｃ Ａ Ｄ） 作为聚合物钻井液处理剂抑制粘土水化膨胀性能、配浆性能（ 增粘性、耐盐性和复配性） 以及可生物降解性能，着重研究了 Ｃ Ａ Ｄ 分子结构对其性能的影响，同时探索了 Ｃ Ａ Ｄ 控制粘土水化与提高低固相泥浆粘度的作用机理。结果表明，具有适当分子结构的 Ｃ Ａ Ｄ 两性纤维素类聚合物，能兼备较好的抑制、配浆和可生物降解性，显示出作为多功能新型钻井液处理剂的应用前景。更多还原

【Abstract】 The performance properties of graft CAD copolymers of carbxymethylcellulose (CMC) with acrylamide (AM) and dimethyldallylammonium chloride (DMDAAC) as drilling fluid additive are inverstigated in relation to their molecular structural characteristics (MSCs). The mechanisms involved in clay hydration inhibition and low solid fluid viscosifying by CAD copolymers are explored tentatively. It is shown that the CAD copolymers with suitable MSCs have good performance of viscosifying, salts tolerancy, and compatibility with other additives and are inhibitory and biodegradable that suggests potential use as multifunctional drilling fluid additive.更多还原