Well logging apparatus having a cylindrical housing with antennas formed in recesses and covered with a waterproof rubber layer
US4949045A · kind A · utility
105Cited by
22References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Jun 20, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A well logging apparatus is disclosed including a cylindrical housing with a transmitting antenna and first and second receiving antennas. The antennas are formed on insulating material in recesses in the housing and have a waterproof rubber covering. The receiving antennas have adjacent compartments containing signal conditioning circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.