发明名称 |
DRY CEMENT FORMULATION FOR CEMENTING HOLES IN THE EARTH |
摘要 |
Dry cement formulation for cementing holes in the earth, preferably oil-, gas- and/or natural heat of the earth holes, comprises (a) 20-99.9 wt.% of cement, (b) 0-65 wt.% of quartz powder and/or quartz dust, (c) 0.1-30 wt.% of dispersion powder redispersible in water and (d) 0-20 wt.% of further additives. |
申请公布号 |
EP2089335(A1) |
申请公布日期 |
2009.08.19 |
申请号 |
EP20070847190 |
申请日期 |
2007.11.15 |
申请人 |
AKZO NOBEL N.V. |
发明人 |
WILLIMANN, HONGLI;VALLEE, FRANCK;ZHANG, CHARLES |
分类号 |
C04B14/06;C04B24/26;C04B40/06 |
主分类号 |
C04B14/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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