Method and apparatus for measuring azimuth and speed of horizontal fluid flow by a borehole
US4169979A · kind A · utility
15Cited by
4References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1977 |
| Grant date | Oct 2, 1979 |
| Priority date | — |
| Expiry date | Jul 15, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/111
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Formation fluid is activated by a neutron source. A cluster of three gamma ray detectors provides count rate data with the count values varying among the three detectors as dictated by the geometry of the cluster and the angle of displacement of the activated fluid between the time of neutron bombardment and that of gamma ray detection. Measurements at different time intervals following the activation of the fluid may also be interpreted in terms of the speed of horizontal fluid flow past the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.