Iron control agent

Details Iron control agent Iron control agent

2011-08-23

2011-08-23

Kugel, Timothy J. (Department: 1761)

Earth boring, well treating, and oil field chemistry

Well treating

Contains inorganic component other than water or clay

C507S252000, C507S256000, C507S257000, C507S258000, C507S267000, C507S272000, C166S304000, C166S305100

Reexamination Certificate

active

08003581

ABSTRACT:
An iron control agent capable of reducing ferric iron containing compounds to ferrous iron containing compounds in an acidic solution, such as one used for formation acidizing. The iron control agent comprises a combination of a sulfur dioxide, sulfurous acid, sulfite salts, bisulfite salts, or thiosulfate salts or mixtures thereof, with a source of copper ions and a source of iodine or iodine ions. The iron control agent may also include small amounts of an adjunct such as stannous chloride, 2-mercaptoethanol, and thioglycolic acid and its salts.

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