Array antenna for measurement-while-drilling
US8378908B2 · kind B2 · utility
22Cited by
14References
70Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2007 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Dec 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/205
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electromagnetic antenna for Measurement-While-Drilling (MWD) applications is disclosed. The antenna can include several array elements that can act alone or together in various measurement modes. The antenna elements can be disposed in tool body recesses to be protected from damage. The antenna elements can include a ferrite plate crossed or looped by independent current carrying conductors in two or more directions forming a bi-directional or crossed magnetic dipole. Although disclosed as a MWD system conveyed by a drill string, basic concepts of the system are applicable to other types of borehole conveyance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.