Tracer injection method
US4861986A · kind A · utility
20Cited by
13References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Mar 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tracer injection method is set forth and is practiced by using spaced end located injectors on a sonde having spaced detectors along the length of the sonde. The injectors inject radioactive isotopes which are distinguishable from one another at the detectors. The method contemplates simultaneous injection of different isotopes, making measurements to determine fluid flow velocity in the casing, and selecting peaks to obtain measurements of the fluid flow velocity in leaks through the casing into external channels along the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.