Crosslinking water soluble polymers with iron to form gels for u

Details Crosslinking water soluble polymers with iron to form gels for u Crosslinking water soluble polymers with iron to form gels for u

1990-09-14

1991-11-19

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166294, 166300, 405 52, 405154, 523130, 523132, E21B 33138, E02D 312

Patent

active

050658220

ABSTRACT:
A process of profile modifying permeable soils with an environmentally safe composition of a non-toxic water-soluble polymer, a redox couple of a water-soluble ferrous salt and a non-toxic, oxidizing agent which are mixed in water and pumped into a subterranean formation wherein ferrous ion is oxidized to ferric ion to gel the polymer making the subterranean formation impermeable.

REFERENCES:
patent: 3306870 (1967-02-01), Eilers et al.
patent: 3785437 (1974-01-01), Clampitt et al.
patent: 3926258 (1975-12-01), Hessert et al.
patent: 3978928 (1976-09-01), Clampitt
patent: 4018286 (1977-04-01), Gall et al.
patent: 4039029 (1977-08-01), Gall
patent: 4825949 (1989-05-01), Ryles et al.

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