Method and apparatus for directional resistivity measurement while drilling
US7057392B2 · kind B2 · utility
41Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Jul 22, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A resistivity tool has a body with at lest one pair of grooves on its exterior oriented orthogonal to the tool axis. A coil antenna is oriented orthogonal to the grooves in a hole intersecting the grooves and oriented orthogonal to the tool axis. The antenna and an antenna core define a plurality of small antenna loops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.