Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Patent
1997-08-04
2000-05-09
Tucker, Philip
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
507249, 507272, 507277, 507933, 507934, 166279, 166300, 166307, C09K 300, E21B 4316
Patent
active
060604352
ABSTRACT:
A solubilized iron reducing additive for acid solutions and method for preparing such a solubilized iron reducing additive. The additive includes an iron reducing agent reactable with ferric ions to produce therefrom ferrous ions and a spent iron reducing compound. The spent iron reducing compound is incapable of reacting with ferric ions to produce ferrous ions. So that the reducing process may continue, a regenerating agent is mixed with the iron reducing agent, the regenerating agent being reactable with the spent iron reducing compound for regenerating the spent iron reducing compound back to the iron reducing agent state. Because it has been found that the iron reducing agent and regenerating agent readily fall out of suspension as precipitates after short periods of time after mixing, a solubility facilitator is admixed thereto for facilitating establishment of the solubilized additive for acid solutions. A catalyst for catalyzing the reduction of ferric ions to ferrous ions in acid solutions may be optionally included.
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Beard Ricky N.
Vinson Edward F.
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