Device provided with retractable arms for the anchoring of an instrument in a cavity
US4428422A · kind A · utility
22Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1982 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Mar 9, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A retractable anchoring device for a sonde to be lowered into a well for logging purpose, is adapted to rigidly position the sonde at a preselected depth. The device comprises pivotable anchoring arms adapted to apply against the wall of the well a substantially constant force produced by associated jacks actuated by driving means so as to apply to the respective arms forces which are limited by specific valves therefor in the hydraulic circuit feeding of the jacks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.