Gas hold up tool for use in cased well boreholes
US5359195A · kind A · utility
6Cited by
14References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1992 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Feb 26, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for determining the percentage of gas by volume in a well producing mixed phase fluids and flowing up the cased well. A low energy gamma ray source irradiates the flowing fluid and counts are measured by a detector crystal. A metal casing shields the surrounding formations from the gamma radiation so that the detector response is determined primarily by the mixed phase fluids flowing in the well. Calibration enables the determination of gas volume percentage for a specific diameter casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.