Superconducting gradiometer-magnetometer array for magnetotelluric logging
US4349781A · kind A · utility
26Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1980 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Jan 7, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/846
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A subsurface electromagnetic sensing device for use in boreholes and mine shafts which includes a sonde for lowering underground which is supercooled and contains Squid gradiometers for measuring vector current density, and magnetometers for measuring vector magnetic fields. When these measured values are combined, information is obtained to construct a conductivity model of the underlying and surrounding subsurface region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.