Magnetic resonance method for characterizing fluid samples withdrawn from subsurface earth formations
US6825657B2 · kind B2 · utility
38Cited by
14References
29Claims
0Family size
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Key dates
| Filing date | Oct 30, 2001 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Dec 26, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Nuclear magnetic resonance techniques are used in a fluid sampling tool that extracts a fluid from subsurface earth formations into a flow channel within the tool. The magnetic resonance techniques involve applying a static magnetic field and an oscillating magnetic field to the fluid in the flow channel, and magnetic resonance signals are detected from the fluid and analyzed to extract information about the fluid such as composition, viscosity, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.