Flowshot technique
US7227129B2 · kind B2 · utility
7Cited by
6References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Jun 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/712
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pulsed neutron source irradiates an earth formation. The irradiation produces N16 from O16 in a fluid in the borehole, and the gamma rays produced by the subsequent decay of N16 are detected by a plurality of spaced apart detectors. The count rates of the detectors are accumulated over a time sampling interval to produce temporal signals. Processing of the temporal signals using correlation, differentiation and/or semblance techniques is used for determination of the flow velocity of one or more fluids in the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.