Aqueous solution and method for use thereof
US9796490B2 · kind B2 · utility
4Cited by
64References
13Claims
0Family size
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Key dates
| Filing date | Oct 24, 2013 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Aug 12, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/27
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Aqueous compositions contain hydrochloric acid at a concentration between 8 wt % and 28 wt % inclusive. The amino acid; hydrochloric acid mole ratio may be between 0.2 and 1.5. Sufficient water is present to dissolve the hydrochloric acid and the amino acid. Such compositions have utility as retarders for acid compositions employed in the stimulation of subterranean formations. Slowing the reaction between the acid and formation helps maximize formation permeability and productivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.