发明名称 |
Drilling mud additives based on a polymer mixture, their use, and a process for their production |
摘要 |
Drilling mud additives based on a polymer mixture of 20 to 80% by weight carboxymethyl cellulose and 80 to 20% by weight of a polycarboxylic acid selected from polyacrylate, polymethacrylate and/or copolymers thereof and/or salts thereof, in which the carboxymethyl cellulose, which has been obtained from raw linters and/or wood cellulose by the slurry process, is mixed in wet, alcohol-moist form with the polycarboxylic acid and dried, to their use in drilling muds or workover and packer liquids, and to a process for their production.
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申请公布号 |
US5028342(A) |
申请公布日期 |
1991.07.02 |
申请号 |
US19890414978 |
申请日期 |
1989.09.29 |
申请人 |
HENKEL KOMMANDITGESELLSCHAFT AUF AKTIEN;PHRIKOLAT CHEMISCHE ERZEUGNISSE GMBH |
发明人 |
OPITZ, WILLY;MUELLER, HEINZ;HEROLD, CLAUS-PETER;VON TAPAVICZA, STEPHAN |
分类号 |
C09K8/10;C09K8/20 |
主分类号 |
C09K8/10 |
代理机构 |
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代理人 |
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地址 |
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