发明名称 |
DRY CEMENT FORMULATION FOR CEMENTING HOLES IN THE EARTH |
摘要 |
The invention relates to a dry cement formulation for cementing holes in the earth, in particular oil, gas and/or natural heat of the earth holes. Said dry cement formulation contains a) approximately 20 to 99.9 % in weight of cement, b) approximately 0 to 65 % in weight of quartz powder and/or quartz dust, c) approximately 0.1 to 30 % in weight of dispersion powder that can be redispersed in water and d) approximately 0 to 20 % in weight of additional additives. The invention also relates to the use of the dry cement formulation for producing a cement slurry and to the use of dispersion powders, that can be redispersed in water, in a cement slurry for cementing holes in the earth. The cement slurries can be used to reduce the water loss of the cement slurry, to reduce the gas and/or water penetration and/or to seal the gas and/or water channels by introducing and hardening the cement slurry in the hole. |
申请公布号 |
WO2008059037(A1) |
申请公布日期 |
2008.05.22 |
申请号 |
WO2007EP62426 |
申请日期 |
2007.11.15 |
申请人 |
ELOTEX AG;WILLIMANN, HONGLI;VALLEE, FRANCK;ZHANG, CHARLES |
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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