Inhibitor Compositions Stabilizing Corrosion and Scale in Oilfield Fluids
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Solution Overview
Problem
Current inhibitor compositions for oilfield fluids, combining corrosion and scale inhibitors, are often unstable and ineffective in extreme conditions, leading to deposition issues and equipment plugging, necessitating a stable and efficient treatment solution.
Innovation Solution
The development of inhibitor compositions comprising a polar solvent, a corrosion inhibitor (such as amine-fatty acid condensate or quaternary ammonium compounds), a scale inhibitor (like polymers derived from dicarboxylic acids), and a stabilizing corrosion inhibitor, which are formulated to maintain stability and performance across various temperatures and pressures, using surfactants and specific solvent ratios to enhance film persistence and reduce emulsion formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inhibitor composition comprises both a corrosion inhibitor and a scale inhibitor, then the inhibition effectiveness is improved, but the composition stability deteriorates
Solution Approach 1:
The patent introduces a stabilizing corrosion inhibitor as an intermediary substance that mediates between the corrosion inhibitor and scale inhibitor. This stabilizing agent prevents harmful interactions between the corrosion and scale inhibition components, maintaining composition stability while preserving both inhibition functions. The stabilizing corrosion inhibitor acts as a bridge that allows the presence of multiple active ingredients without causing precipitation or decomposition.
Solution Approach 2:
The patent creates a composite inhibitor composition by combining a corrosion inhibitor, a scale inhibitor, and a stabilizing corrosion inhibitor in specific proportions. This composite formulation leverages the synergistic effects of the individual components while the stabilizing agent ensures compatibility. The composite structure allows the composition to maintain stability across a wide range of oilfield conditions while providing both corrosion and scale inhibition capabilities.
2Reliability
If the inhibitor composition is deployed into an oil well or reservoir, then the treatment effectiveness is improved, but scale deposition and precipitation occur
Solution Approach 1:
The patent applies preliminary anti-action by incorporating a stabilizing corrosion inhibitor that preemptively prevents scale deposition and precipitation before they can occur. This stabilizing agent creates a protective environment in the inhibitor composition that counteracts the tendency of scale-forming components to precipitate, thereby maintaining treatment effectiveness while preventing harmful scale deposition in the oil well or reservoir.
3Adaptability or versatility
If multiple injection pumps and storage spaces are used for different inhibitors, then the treatment versatility is improved, but the operational complexity increases
Solution Approach 1:
The patent merges multiple inhibitor functions into a single composite composition that combines corrosion inhibition, scale inhibition, and stabilization capabilities. This unified formulation eliminates the need for separate injection systems and storage spaces for different inhibitors, thereby reducing operational complexity while maintaining treatment versatility. The combined composition can be injected through a single pump system and stored in one location, simplifying the overall operational framework.
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 compositions effectively inhibit corrosion and scale deposition, demonstrate high thermal stability, are compatible with low-alloy steels, and reduce maintenance costs by minimizing the need for multiple injection pumps and storage space, while maintaining stability in high total dissolved solids environments.
Implementation Method 1
inhibitor compositions comprising from about 1 wt. % to about 80 wt. % of a polar solvent; a corrosion inhibitor, a scale inhibitor, and a stabilizing corrosion inhibitor
Data Source
AI summary
The present disclosure describes inhibitor compositions comprises a corrosion inhibitor, a scale inhibitor, a stabilizing corrosion inhibitor and a polar solvent. These inhibitor compositions can be used in the oil and gas industry and are formulated to provide a stable inhibitor composition that has stability in extreme conditions, such as high temperature, high pressure, or low pressure.