Induction log sonde feedpipe having a plurality of tubes arranged within it and windows to facilitate the passage of the conductors
US5463319A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1993 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Jul 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An induction log is constructed in a sonde and has at least one or more transmitter coils and at least one or more receiver coils. The sonde supports a power supply and telemetry equipment along with transmitter and receiver apparatus for the coils. The transmitter coils require current levels as much as 1 amperes while the receive signals form output signals which are merely a fraction of a microvolt. The feedpipe array is preferably a feedpipe adapted to be centered in the axial lengthwise portion of the sonde and is further provided with a plurality of openings to enable leads for the coils to be connected. The feedpipe array is formed with a set of multiple steel tubes which are collectively assembled as a bundle on the interior of a copper sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.