Compositions – Leather or fur treating
Patent
1988-04-05
1989-12-19
Terapane, John F.
Compositions
Leather or fur treating
166307, E21B 4327
Patent
active
048881210
ABSTRACT:
A precipitation control additive composition, an acidizing composition for treating a sour well and a method of treating a sour well are provided. An iron sequestering agent, such as aminopolycarboxylic acids, hydroxycarboxylic acids, cyclic polyethers, and derivatives thereof and a sulfide modifier, such as aldehyde, acetal, hemiacetal, and many other compounds capable of forming aldehydes in solution are added to a treating solution. The iron sequestering agent cobines with iron present in the solution while the sulfide modifier combines with sulfides present in the solution. By combining with both iron and sulfides present in the solution, the combination of an iron sequestering agent and a sulfide modifier effectively inhibits precipitation of ferric hydroxide, ferrous sulfide and free sulfur from the solution. As a result, formation and other serious damage is prevented.
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Dill Walter R.
Walker Michael L.
Dougherty Clark
Geist Gary
Halliburton Company
Kent Robert A.
Terapane John F.
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