Controlled gel breaker
US5807812A · kind A · utility
106Cited by
24References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1997 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Apr 9, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/923
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Hydrocarbon fracturing fluids are made by combining organic phosphate esters with polyvalent metal salts in hydrocarbon carriers to form gels; breaking of the gel is retarded or otherwise controlled over a wide range of water concentrations, through the use of slowly soluble alkaline earth metal compounds, preferably hard burned magnesium oxide, which may be added along with the gel component. The slowly soluble alkaline earth metal compound is employed together with an oily acid breaker retarding agent such as tall oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.