| 发明名称 |
ADDITIVE COMPOSITION FOR CEMENT PASTES |
| 摘要 |
<p>The invention relates to an additive composition to be used as setting retarder for the cement pastes employed in oil- and gas-well cementing at temperatures below 100A C. According to the invention, the additive composition comprises 90% sulphomethylated acrylic polymer having a molecular mass ranging between 8000 and 215000 g/mole and a sulphomethylation degree between 30 and 40%, and 10% polypropylene glycol.</p> |
| 申请公布号 |
RO122722(B1) |
申请公布日期 |
2009.12.30 |
| 申请号 |
RO20010001139 |
申请日期 |
2001.10.19 |
| 申请人 |
SOCIETATEA NA IONAL E A PETROLULUI PETROM S.A.- SUCURSALA INSTITUTUL DE CERCET ERI I PROIECT ERI TEHNOLOGICE |
发明人 |
POPESCU FILIP;MITITEANU LIVIU;STADLER PETRE;STAICU EUGENIA;STADLER LIDIA |
| 分类号 |
C04B24/24;C04B103/22;C09K8/44 |
主分类号 |
C04B24/24 |
| 代理机构 |
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