Promoters for peroxides in aqueous treatment fluids
US10138413B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Feb 20, 2014 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Feb 20, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The addition of at least one promoter selected from the group consisting of thiosulfate salts, sulfite salts, bisulfite salts, erythorbate salts, isoascorbate salts, and combinations thereof to an aqueous treatment fluid containing a viscosifying polymer and a peroxide helps to promote the activity of the peroxide as a breaker, thus facilitating a reduction in viscosity of the aqueous treatment fluid at lower temperatures than are possible in the absence of the promoter. The promoted aqueous treatment fluid is useful as a fracture fluid to fracture subterranean formations in oil and gas recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.