Nanotracer for oil recovery comprising an occluded polynucleotide and method of preparation thereof
US11193368B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Oct 28, 2020 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Oct 28, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y40/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Tracers for oil recovery, particularly fluorescent nanotracers comprising polynucleotides such as DNA strands. The tracer comprises a core-shell nanoparticle tailored according to the operation to be traced. It contains a fluorescent core comprising a target polynucleotide that allows the detection thereof in the field and a functionalized polymeric shell that provides increased stability in high salinity aqueous phases. A method for preparing said nanotracer by encapsulation of a polynucleotide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.