Logging while drilling tool with azimuthal sensistivity
US5892460A · kind A · utility
68Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Mar 6, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An azimuthally sensitive LWD tool is disclosed, comprising a transmitting antenna, a receiving antenna, wherein the receiving antenna is azimuthally focused so as to be more sensitive to changes in magnetic flux in a particular azimuthal segment of the antenna and means for measuring current induced in the receiving antenna as a result of current flowing through said transmitting antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.