Washpipeless isolation strings and methods for isolation
US7124824B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2003 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Feb 12, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An isolation string having: an upper packer; and an isolation pipe in mechanical communication with the upper packer, wherein the isolation pipe comprises a pressure activated valve and an object activated valve. A method having: running-in an isolation string on a service tool, wherein the isolation string comprises a pressure activated valve and a object activated valve; setting the isolation string in the casing adjacent perforations in the casing; releasing an object from the service tool, whereby the object travels to the object activated valve; closing the object activated valve with the released object; and withdrawing the service tool from the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.