Device for anchoring a probe in a well by spreading mobile anchorage arms
US4957162A · kind A · utility
5Cited by
7References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 30, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/042
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device is provided for anchoring a probe in a well by remote control spreading, from the surface, of at least one anchorage arm kept in a closed position by a retractable bolt engaged in a rod connected to the anchorage arm by links. The external pressure is exerted permanently on the bolt and the bolt is fast with a head movable in a cavity. A pressure is applied to the head which is proportional to the external pressure which holds the bolt locked in the rod or a much lower pressure resulting in release of the bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.