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US 10,479,925 B2Granted
Use of hexamethylenetetramine intensifier for high temperature emulsified acid system
AssigneeHalliburton Energy Services, Inc.
InventorsNisha Kaustubh Pandya, Juanita Cassidy
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Abstract
The invention provides a method, composition, and system for inhibiting corrosion where the composition forms an acid-in-oil emulsion comprising hexamethylenetetramine, a corrosion inhibitor; and at least one emulsifier.
Claims25
A method of treating a subterranean formation comprising:
- contacting the subterranean formation with a corrosion inhibition composition consisting essentially of:
- (A) hexamethylenetetramine,
- (B) a corrosion inhibitor,
- (C) a combination of emulsifiers, the combination comprising a long chain polyamine and an alkoxylate amine,
- (D) an acid in an aqueous acid solution, and
- (E) optionally, a corrosion inhibiting intensifier,
- wherein the corrosion inhibition composition does not comprise an acetylenic alcohol, and
- wherein the corrosion inhibition composition is a stable acid-in-oil emulsion at temperatures above about 300° F.
5 more elements
A corrosion inhibition composition consisting essentially of:
- (A) hexamethylenetetramine,
- (B) a corrosion inhibitor,
- (C) a combination of emulsifiers, the combination comprising a long chain polyamine and an alkoxylate amine,
- (D) an aqueous acid, and
- (E) optionally, a corrosion inhibiting intensifier,
- wherein the corrosion inhibition composition does not comprise an acetylenic alcohol, and
- wherein the corrosion inhibition composition is a stable acid-in-oil emulsion at temperatures above about 300° F.
4 more elements
Dependencies are inferred from the claim text.