Encapsulated radioactive tracer
US5929437A · kind A · utility
97Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | May 20, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Radioactive particles are provided for use in tracing the flow path in or near a well of fluids injected into the well. The particles include an element which can be made radioactive by bombardment with neutrons and a material to encapsulate the element. The encapsulant is preferably an organic polymer having a high softening temperature. The particles may be injected into a well in treating fluids and their location may be later determined by gamma ray logging of the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.