Isolation system and gravel pack assembly and uses thereof
US5865251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1996 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Dec 12, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An isolation system is disclosed which includes a production screen and an internal isolation pipe sealed with the production screen at proximal and distal ends, and an internal sleeve slidably coupled with the isolation pipe. The isolation pipe defines at least one port and the sleeve defines at least one aperture, and the sleeve is moveable between an open position in which the port and aperture are in communication to permit fluid flow therethrough, and a closed position in which the port and aperture are not in communication and fluid flow is prevented. The sleeve is manipulated by a service string and multi-action shifting tool between the opened and closed positions. Also disclosed is a gravel packer and method of operation incorporating the isolation system, as well as a service tool and service string assembly useful therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.