Gamma ray spectral tool for borehole use
US4504736A · kind A · utility
9Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Jun 16, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/017
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention relates to a logging tool housing construction for use with gamma ray logging devices. The tool housing is constructed of materials designed for maximum transmission of low energy natural gamma ray energies (E=150-300 Kev). The housing material which encloses a gamma ray detector is a tubular, filament wound graphite composition and has a tubular metal sleeve for wear protection. The core and tubular metal sleeve are constructed and interconnected to meet mechanical and pressure requirements for oil well logging use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.