Corrosion Inhibitor Composition for Acidizing Treatments
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Solution Overview
Problem
Current corrosion inhibitors used in acidizing treatments for oil, gas, and water wells are plagued by toxicity, environmental concerns, and high costs, and they fail to effectively mitigate corrosion caused by acids and other chemicals at elevated temperatures and pressures.
Innovation Solution
A corrosion inhibitor composition comprising a nitrogen-containing heteroaromatic compound and a haloalkynyl carbamate compound, which when combined, exhibit synergistic behavior to significantly reduce corrosion rates on metal surfaces during acidizing treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional corrosion inhibitors (formaldehyde-containing Mannich bases, fatty acid derivatives, dodecyl benzene sulfonic acid) are used, then corrosion protection is provided, but toxicity and environmental concerns increase
Solution Approach 1:
The patent changes the chemical parameters by using biodegradable compounds with specific molecular structures (ester linkages, heteroatoms) that fundamentally alter the toxicity profile while maintaining corrosion inhibition effectiveness. The composition uses compounds with 1-3 heteroatoms and specific functional groups that provide corrosion protection without the harmful effects of conventional inhibitors.
Solution Approach 2:
The patent creates a composite corrosion inhibitor system combining multiple biodegradable compounds including nitrogen-containing heteroaromatic compounds and haloalkynyl carbamate compounds. This composite approach provides synergistic corrosion protection while maintaining environmental compatibility and biodegradability.
2Productivity
If acids are employed for acidizing treatments, then permeability of subterranean formations is increased, but corrosion rate of equipment increases
Solution Approach 1:
The patent introduces biodegradable corrosion inhibitor compounds as intermediary substances that mediate between the acidic treatment environment and the equipment surfaces. These compounds form protective films on metal surfaces, acting as intermediaries that prevent direct contact between corrosive acids and equipment while allowing the acidizing treatment to proceed effectively.
Solution Approach 2:
The patent changes the chemical environment by introducing specific biodegradable compounds that alter the interaction parameters between acids and metal surfaces. The composition modifies the chemical parameters of the acidizing fluid to reduce corrosivity while maintaining the acid's ability to dissolve formation minerals and increase permeability.
3Reliability
If corrosion inhibitors are used to protect equipment, then corrosion is inhibited, but costs for repair and replacement decrease only marginally due to inadequate inhibition at elevated temperatures and pressures
Solution Approach 1:
The patent optimizes molecular parameters of the corrosion inhibitor compounds to enhance their thermal and pressure stability. The biodegradable compounds are selected and designed with molecular structures that maintain their corrosion inhibition effectiveness at elevated temperatures and pressures typical of deep well formations, thereby providing reliable protection under harsh conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The combination of nitrogen-containing heteroaromatic and haloalkynyl carbamate compounds effectively inhibits corrosion on metal surfaces, reducing corrosion rates compared to using either component alone, and is effective in acidic environments commonly encountered in well stimulation processes.
Implementation Method 1
Corrosion inhibitors may be formed as a coating on a surface which comes into contact with corrosive agents
Data Source
AI summary
A corrosion inhibitor composition and a method of inhibiting corrosion on a surface are disclosed. The corrosion inhibitor composition includes at least one nitrogen containing heteroaromatic compound and at least one haloalkynyl carbamate compound. The corrosion inhibitor composition may be utilized with acidizing treatments for wells, in particular for the production of oil, gas, and/or water.