Back to results
US 11,879,092 B2Granted
Modified acid compositions as alternatives to conventional acids in the oil and gas industry
AssigneeDorf Ketal Chemicals Fze
InventorsClay Purdy, Markus Weissenberger
Life of this patent
Estimating the term…
Abstract
An aqueous modified acid composition for industrial activities, said composition comprising: an alkanolamine and strong acid in a molar ratio of not less than 1:15, preferably not less than 1:10; it can also further comprise a metal iodide or iodate. Said composition demonstrates advantages over known conventional acids and modified acids.
Claims7
A method of use of an aqueous modified acid composition in the oil industry to stimulate production of a well, said method comprising:
- providing said aqueous modified acid composition that comprises a mineral acid and an alkanolamine in a molar ratio ranging from 3:1 to not more than 10:1 and having a pH of less than 1;
- exposing a surface within the well, including a metal surface, to the aqueous modified acid composition;
- allowing the aqueous modified acid composition a sufficient period of time to act upon said surface;
- and
- optionally, removing the aqueous acid composition when the exposure time has been determined to be sufficient for stimulation.
2 more elements
A method of use of an aqueous modified acid composition to adjust pH levels in fluid systems, said method comprising:
- providing the aqueous modified acid composition comprising a mineral acid and an alkanolamine in a molar ratio ranging from 3:1 to not more than 10:1 and having a pH of less than 1;
- providing a fluid system of said fluid systems requiring a decrease in pH;
- and
- exposing the aqueous modified acid composition to said fluid system requiring said decrease in pH and allowing sufficient exposure time for the aqueous modified acid composition to lower the pH to the desired level.
1 more element
Dependencies are inferred from the claim text.