Process of cementing wells
US4003431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1972 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Sep 20, 1992 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B40/0032
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of cementing oil, gas or water wells and the like, wherein a solution, dispersion, suspension, or the like of a cement additive in water is prepared at a predetermined concentration of additive and is thereafter mixed with dry powdered cement to form a cement slurry, and a sample of the additive-water mixture is analyzed prior to its being mixed with the cement, to verify that the additive-water mixture contains the desired concentration of additive. The analysis of the additive-water mixture preferably is performed continuously on a sample of the mixture in a spectrophotometer, the output signal of which may be displayed on a meter or may be used to control the relative quantities of water and additive that go into the additive-water mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.