Method and apparatus for measuring water level in a well
US4621264A · kind A · utility
29Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1984 |
| Grant date | Nov 4, 1986 |
| Priority date | — |
| Expiry date | Sep 4, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring the water level in a well including the steps of radiating an electromagnetic wave to a gap between a boring drill rod and a casing pipe by using a transmitting antenna, receiving the electromagnetic wave reflected by a surface of the water level in the casing pipe by using a receiving antenna; then measuring a distance between the surface of the water level and the receiving antenna based on the going and returning time of the electromagnetic wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.