Multiple zone isolation method
US7934555B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2009 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Jun 1, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Multiple producing zones separated by a non-producing zone are gravel packed together. The non-producing zone has locations to take returns so as to get a consistent pack in the non-producing zone. The production string features external seals and/or an internal plug so that no matter which producing zone is aligned to produce, the screens in the non-producing zone are selectively isolated so that the producing zone that is not intended to be produced has only the path through the gravel pack to get to the actual zone being produced. Since the annulus can be long and full of gravel this path will make flow from the zone that is not of interest minimal into the flow from the zone of interest without using a packer between pairs of spaced apart producing zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.