Electromagnetic logging while drilling tool
US9541666B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2014 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | May 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A deep reading electromagnetic logging while drilling tool includes first and second logging while drilling subs, the first of which includes a first transmitter and a first receiver axially spaced apart from one another and the second of which includes a second transmitter and a second receiver axially spaced apart from one another. Each of the first and second transmitters and first and second receivers includes an axial antenna and collocated first and second transverse antennas. The first and second transverse antennas in the first receiver are rotationally offset by a predefined angle from the first and second transverse antennas in the first transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.