Methods and apparatus for safely measuring downhole conditions and formation characteristics while drilling a borehole
US4814609A · kind A · utility
17Cited by
18References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Mar 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A borehole logging apparatus for performing radiation based measurements has a tubular body for movement through a borehole. The tubular body includes an upwardly opening passage and an interior chamber for accommodating the positioning and lengthwise insertion and removal of an energy radiating source. The radiation source includes an uppermost portion which may be remotely engaged by a source removing device for its removal in the event the tool becomes stuck in the borehole and in order to facilitate source handling at the earth's surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.