Method for isolating multiple gravel packed zones in wells
US5411090A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1993 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Oct 15, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An auger type gravel pack screen assembly is interposed in a well which is adapted to produce fluids from two spaced-apart zones of interest through gravel packing surrounding the screen assembly. The screen assembly includes a blank pipe section extending through a layer of mixed size gravel of relatively low permeability to prevent the flow of water or gas through the wellbore between the producing zones. The mixed size gravel layer may be placed in the well with a dump type bailer to minimize mixing of the mixed size gravel with a layer of gravel already in the well. The intermediate layer of gravel packing may have its permeability reduced by injecting a settable resin material or the like through a section of the screen assembly which is adapted to provide for injection of such permeability reducing material from a tubing string inserted within the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.