Natural gamma ray logging sub method and apparatus
US7217917B1 · kind B1 · utility
11Cited by
6References
9Claims
0Family size
Inventors
Key dates
| Filing date | Sep 21, 2006 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Sep 21, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A natural gamma tag marking materials for sub or permanent markers used in gamma logging operations, such natural gamma materials having a gamma count of between 200 and 1000 counts per second. The instant invention further discloses a typical Sub, for insertion in a drilling operation, utilizing natural gamma element compounds which are considered to be non-hazardous and effective as tag markers when used in wire-line logging operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.