Colloidal Nanoparticle Dispersion Pipeline Cleaning
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Solution Overview
Problem
Pipelines used for transporting fluids such as crude oil and natural gas face issues with corrosion and deposition of materials like scale, corrosion byproducts, and biofilms, which lead to restricted flow and potential blockages, and existing cleaning methods like pigging are not entirely effective.
Innovation Solution
A method involving the use of a colloidal particle dispersion with inorganic nanoparticles, such as silica, applied through a pigging process to penetrate and break down deposits on pipeline surfaces, combined with a surfactant and solvent system to facilitate removal and drying, allowing for effective cleaning without disrupting fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pigging operations are used to remove deposits, then deposits are physically scraped off the pipeline, but the cleaning effectiveness is limited and not entirely successful
Solution Approach 1:
A chemical treatment composition is introduced as an intermediary substance between the pigging operation and the deposits. The composition penetrates the deposit structure and chemically breaks it down, enhancing the mechanical scraping action of the pig. This combination allows the pig to effectively remove tenaciously adhering deposits that mechanical means alone cannot eliminate.
Solution Approach 2:
The treatment composition changes the chemical parameters of the deposit structure by penetrating and breaking down the bonding between deposit layers and the pipeline surface. This chemical transformation converts tenaciously adhering deposits into removable material, fundamentally changing the removal mechanism from purely mechanical to chemically-assisted mechanical removal.
2Productivity
If the pipeline interior is left bare metal for fluid transport, then flow efficiency is maintained, but corrosion occurs due to exposure to corrosive fluids and cathodic protection limitations
Solution Approach 1:
The treatment composition is applied in advance to clean and prepare the pipeline surface before fluid transport begins. By removing deposits that create corrosion cells and treating the surface with corrosion-inhibiting agents, the pipeline is pre-protected against corrosion while maintaining the bare metal configuration needed for efficient fluid flow.
Solution Approach 2:
The treatment composition converts the harmful effect of corrosive fluids contacting bare metal into a beneficial protective state. Corrosion-inhibiting ingredients in the composition form protective films or alter the surface chemistry to resist corrosion, transforming the vulnerable bare metal surface into a corrosion-resistant surface while maintaining flow efficiency.
3Productivity
If water is present in the pipeline as entrained water, then fluid transport is enabled, but corrosion cells form under deposits facilitating under-deposit corrosion
Solution Approach 1:
The treatment composition acts as an intermediary that disrupts the corrosion cell formation process. It penetrates under deposits where water is entrapped and introduces corrosion-inhibiting chemicals that neutralize the corrosive environment, preventing the electrochemical reactions that create under-deposit corrosion while allowing water to remain in the pipeline for fluid transport.
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 method effectively removes deposits and inhibits corrosion, allowing for improved pipeline flow and reduced maintenance frequency, while also drying the pipeline and potentially reducing bacterial growth.
Implementation Method 1
a colloidal particle dispersion with inorganic nanoparticles, such as silica, applied through a pigging process to penetrate and break down deposits on pipeline surfaces
Implementation Method 2
colloidal particle dispersion with inorganic nanoparticles, such as silica
Implementation Method 3
combined with a surfactant and solvent system to facilitate removal
Implementation Method 4
allowing for effective cleaning without disrupting fluid flow
Implementation Method 5
combined with a surfactant and solvent system to facilitate removal and drying
Data Source
AI summary
A method of treating a pipeline is performed by selecting a colloidal particle dispersion having inorganic nanoparticles with an average particle size of from 500 nm or less that exhibit properties of Brownian motion that facilitate penetration of solid deposits on interior surfaces of a pipeline. A treatment composition comprising the colloidal particle dispersion is introduced into an interior of a pipeline by at least one of (A) introducing a batch amount of the treatment composition in a selected volume into the interior of the pipeline, and (B) continuously introducing the treatment composition at a selected rate into the interior of the interior of the pipeline. The composition is allowed to act upon the surfaces and materials adhering to the surfaces of the interior of the pipeline.