Method for isolating multiple gravel packed zones in wells

Details Method for isolating multiple gravel packed zones in wells Method for isolating multiple gravel packed zones in wells

1993-10-15

1995-05-02

Dang, Hoang C.

Wells

Processes

Graveling or filter forming

166 51, 166313, E21B 4304

Patent

active

054110904

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.

REFERENCES:
patent: 1394192 (1921-10-01), Fitzpatrick
patent: 2597554 (1952-05-01), West
patent: 4008763 (1977-02-01), Lowe, Jr.
patent: 5036920 (1991-08-01), Cornette et al.
patent: 5078212 (1992-01-01), Boyle et al.
patent: 5090478 (1992-02-01), Summers
patent: 5143606 (1992-09-01), Bernhardt
patent: 5145004 (1992-09-01), Cornette
patent: 5163512 (1992-11-01), Brewer et al.
patent: 5234055 (1993-08-01), Cornette

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