Active Reinjection System for Pipeline Liner Pressure Control
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Solution Overview
Problem
Liner collapse in pipelines due to excessive pressure in the annulus, which can occur when permeated fluids accumulate and exceed the internal pressure, leading to potential irreversible deformation and loss of structural integrity.
Innovation Solution
An active reinjection system that includes a fluid pump and suction line to extract permeated fluids from the annulus and reintroduce them into the pipeline interior, maintaining pressure balance and preventing liner collapse, while also ensuring continuous flow and monitoring the system's integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liner is installed in the pipeline to protect against corrosion, then corrosion protection is improved, but pressure buildup in the annulus can cause liner collapse
Solution Approach 1:
The patent extracts the harmful permeated fluid from the annulus through a venting system that includes a suction line connected to a pump, which removes the fluid that would otherwise build up pressure and collapse the liner
Solution Approach 2:
The patent introduces a venting system as an intermediary mechanism between the annulus and the external environment, allowing controlled removal of permeated fluid while maintaining system integrity and preventing liner collapse
2Quantity of substance
If permeated fluid accumulates in the annulus, then fluid permeation is a natural process, but excessive pressure causes liner collapse
Solution Approach 1:
The patent implements a feedback mechanism where the venting system continuously monitors and responds to pressure buildup in the annulus by activating the pump to remove permeated fluid when pressure exceeds safe levels, thereby maintaining pressure equilibrium
Solution Approach 2:
The patent ensures continuous operation of the venting system with the pump running continuously or periodically to maintain constant pressure control in the annulus, preventing any accumulation that could lead to liner collapse
3Strength
If a venting system is installed to remove permeated fluid, then liner collapse is prevented, but system complexity increases
Solution Approach 1:
The patent applies self-service by using the existing pipeline fluid as a motive fluid to power the pump through a jet pump mechanism, eliminating the need for external power sources and reducing system complexity while maintaining effective pressure control
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 active reinjection system effectively prevents liner collapse by maintaining pressure equilibrium, ensuring the structural integrity of both the liner and the pipeline, and allowing for controlled venting and reinjection of permeated fluids, thus preventing mechanical yield and maintaining steady operating pressure.
Implementation Method 1
a suction line extending from the reinjection line to receive a portion of the permeated fluid
Implementation Method 2
a portion of the pipeline fluid permeates the liner as permeated fluid and enters an annulus defined between the liner and the pipeline
Data Source
AI summary
A pipeline system includes a pipeline, and a liner arranged within the pipeline, and a pipeline fluid is conveyed within the interior of the pipeline and a portion of the pipeline fluid permeates the liner as permeated fluid and enters an annulus defined between the liner and the pipeline. A venting system includes an active reinjection system that includes a reinjection line that receives the permeated fluid from the annulus, a suction line extending from the reinjection line to receive a portion of the permeated fluid, and a fluid pump that receives the portion of the permeated fluid and discharges the permeated fluid into the interior of the pipeline.