Propping agent based on zirconia and silica for deep geological fractures
US4607697A · kind A · utility
16Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1985 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Aug 6, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/267
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a granular propping for use in petroleum extraction which has a high mechanical resistance and a density of between 3150 and 3250 kg/m.sup.3, the propping agent consisting of balls formed by melting, granulating and solidifying an initial composition comprising by weight, on the basis of the oxides, 47.1 to 48.7 parts of ZrO.sub.2, 52.9 to 51.3 parts of SiO.sub.2, the total of ZrO.sub.2 +SiO.sub.2 amounting to 100 parts, 8.2 to 16.9 parts of Al.sub.2 O.sub.3 and 4.1 to 8.5 parts of at least one oxide selected from the group formed by MgO, CaO, FeO and TiO.sub.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.