abstract |
The present invention relates to cement compositions and their use in cementing operations; the cements comprise an aluminosilicate; a sodium aluminate, a calcium aluminate, a potassium aluminate or combinations thereof; and water; in some cases, the cement does not include Portland cement; The cement can be used in an underground formation that has corrosive components in it, where the hardened cement sheath is resistant to degradation caused by corrosive components within the underground formation. |