专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06277900B1 Well cementing aids 有权
标题翻译：固井助剂
公开(公告)号：US06277900B1
公开(公告)日：2001-08-21
申请号：US09196668
申请日：1998-11-19
申请人： Reinhard Oswald , Volker Frenz , Juergen Tonhauser , Aranka Tardi , Pierre Maroy , Florence L'Alloret
发明人： Reinhard Oswald , Volker Frenz , Juergen Tonhauser , Aranka Tardi , Pierre Maroy , Florence L'Alloret
IPC分类号： C09K700
CPC分类号： C09K8/46 , C04B24/163 , C04B28/02 , C08F220/54 , C08F220/58 , C04B22/0026
摘要： The present invention relates to copolymers consisting of (a) 1-99% by weight of structural units of the formula (1) where R1 is hydrogen or methyl, R4 is C1-C22-alkylene, R5 is C1-C22-alkyl or hydrogen, and X is ammonium, lithium, sodium, potassium, an amine or a mixture of these substances, and (b) 99-1% by weight of structural units of the formula (2) where R1 is hydrogen or methyl, R2 and R3, independently of one another, are hydrogen, or C2-C22-alkyl, wherein component b) is not hydrolysed and the copolymers have been prepared by a solution precipitation polymerization in a nonaqueous solvent or a water-miscible, organic solvent having a low water content which is a precipitant for the copolymer. The invention furthermore relates to a process for cementing subterranean wells using a cement slurry comprising the following components: a) water of various salinity cement a novel copolymer in a concentration of 0.01-5% bwoc, preferably from 0.05 to 0.9% bwoc.
摘要翻译：本发明涉及由（a）1-99重量％的式（1）结构单元，其中R 1是氢或甲基，R 4是C 1 -C 22 - 亚烷基，R 5是C 1 -C 22 - 烷基或氢，和X是铵，锂，钠，钾，胺或这些物质的混合物，和（b）99-1重量％的式（2）的结构单元，其中R 1是氢或甲基，R 2和R 3 彼此独立地为氢或C 2 -C 22 - 烷基，其中组分b）未水解，并且该共聚物通过在非水溶剂或具有低水的水混溶性有机溶剂中的溶液沉淀聚合制备作为共聚物的沉淀剂的含量。本发明还涉及一种使用包含以下组分的水泥浆料固井地下井的方法：a）浓度为0.01-5％bwoc，优选0.05-0.9％bwoc的各种盐酸盐型新型共聚物的水。

IPRDB

热门服务

关于我们

友情链接

联系方式