Borehole scanner and sonde position locator for spectral analysis of wall
US4779201A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 21, 1986 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jul 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical head (12) is rotated while a sonde (11) is moved up or down within a bore hole (22), and a beam of light from a light source (22) is projected toward the wall of the bore hole (22) via a lens (21), slit (22), half-mirror (19), mirror (15) and lens (14). Light reflected from the bore hole wall is extracted from the half-mirror (19) via a slit (17) and a photoelectric transducer (18) so that the bore hole wall may be continuously observed. By separating the reflected light into spectral components and processing them, color tone logging and other observations can be performed. The orientation of the sonde (11) is sensed by an azimuth finder (23) and rotation gauge (24), and the inclination of the sonde (11) is sensed by a dipmeter (25). Displacement of the sonde accompanying each unit length of up-or-down movement of the sonde (11) is calculated and the displacements are integrated to obtain the position being observed by the sonde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.