Alumina wellbore cement composition
US5488991A · kind A · utility
23Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Oct 24, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high alumina wellbore cementing composition is provided, the composition comprising: PA1 a) high alumina cement; and PA1 b) a polyacrylic acid phosphinate having a molecular weight of about 3800 in an amount effective to prevent gelation of the cementing composition for a time period of at least three hours. This composition can remain pumpable for a time period sufficiently long to place the cement in a wellbore using conventional wellbore cementing procedures, and, after the composition is cured, is capable of withstanding elevated wellbore temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.