Controlling iron in aqueous well fracturing fluids

Details Controlling iron in aqueous well fracturing fluids Controlling iron in aqueous well fracturing fluids

1992-11-19

1997-10-07

Geist, Gary

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

507933, E21B 4300

Patent

active

056748175

ABSTRACT:
Methods and compositions for controlling iron in aqueous well fracturing fluids are disclosed. In accordance with the methods, ferric iron contained in a fracturing fluid is prevented from precipitating or otherwise disadvantageously reacting by adding a thioalkyl acid or derivative thereof to the fracturing fluid. The thioalkyl acid or derivative reduces ferric ion to ferrous ion which remains in solution at pH levels below about 7.5.

REFERENCES:
patent: 4537684 (1985-08-01), Gallup et al.
patent: 4633949 (1987-01-01), Crowe
patent: 4683954 (1987-08-01), Walker et al.
patent: 4888121 (1989-12-01), Dill et al.
patent: 5073270 (1991-12-01), Gallup et al.

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