公开(公告)号：EP0251558A2

公开(公告)日：1988-01-07

申请号：EP87305334.2

申请日：1987-06-16

申请人： HALLIBURTON COMPANY

发明人： Hollenbeak, Keith H. ,  Brown, Paul S.,Jr.

IPC分类号： E21B43/25

CPC分类号： C09K8/608 ,  C09K8/145 ,  Y10S507/922 ,  Y10S507/925 ,  Y10S507/933

摘要： A clay stabilizing agent is made by polymerizing diallyldimethylammonium chloride with sulfur dioxide in the presence of an erythorbic acid salt as polymerization reaction rate retarder, to form a solid cationic copolymer having the structural formula:
wherein the nitrogen-to-sulfur ratio is from about 1 to about 1.4 and n is such that the molecular weight is about 1000 to about 100,000. When dissolved in an aqueous carrier fluid, the copolymer is particularly effective in preven­ting clay swelling and/or fines migration.

摘要翻译： 一种粘土稳定剂是通过在二异丙基二甲基氯化铵与二异丙苯二异氰酸酯存在下，在异抗坏血酸盐作为聚合反应速率缓凝剂的情况下，形成具有下列结构式的固体阳离子共聚物：，其中氮与硫之比为 约1至约1.4，并且n使得分子量为约1000至约100,000。 当溶解在水性载体流体中时，共聚物特别有效地防止粘土膨胀和/或细粒迁移。