Dissolvable grip or seal arrangement
US5709269A · kind A · utility
131Cited by
3References
16Claims
0Family size
Inventor
Key dates
| Filing date | Dec 6, 1995 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Dec 6, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1212
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to an releasable grip arrangement providing an impermeable barrier in an annular space between an inside tube and an outside tube of an oil well and is made of a material which may be dissolved by a suitable solvent and includes a seal member and a locking member 3, a sleeve which comprises holes which can be blocked during normal use but can be opened to permit the entrance of a solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.