发明公开
- 专利标题： Clay stabilizing agent
- 专利标题（中）： Tonstabilisierungsmittel。
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申请号： EP87305334.2申请日： 1987-06-16
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公开(公告)号： EP0251558A2公开(公告)日： 1988-01-07
- 发明人: Hollenbeak, Keith H. , Brown, Paul S.,Jr.
- 申请人： HALLIBURTON COMPANY
- 申请人地址： P.O. Drawer 1431 Duncan Oklahoma 73536 US
- 专利权人： HALLIBURTON COMPANY
- 当前专利权人： HALLIBURTON COMPANY
- 当前专利权人地址： P.O. Drawer 1431 Duncan Oklahoma 73536 US
- 代理机构： Wain, Christopher Paul
- 优先权： US878160 19860625
- 主分类号： E21B43/25
- IPC分类号： E21B43/25
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.
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.
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