Downhole isolation and depressurization tool
US8931559B2 · kind B2 · utility
4Cited by
151References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2012 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/063
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A depressurization tool is described for use downhole in depressurizing an isolated zone. A decompression chamber containing a compressible fluid volume is described. The opening of the chamber is sealed with a closure that is configured to open upon application of a pressure differential across the opening. When used downhole within an isolated and nonpermeable wellbore zone, excessive ambient pressure will cause the closure to open and allow the chamber to fill with fluid at increased pressure, depressurizing the wellbore zone. The tool is useful in wellbore completion systems that include sliding sleeves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.