Downhole Flow Control Erosion Resistance via Shear Dissipation
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Solution Overview
Problem
Conventional inflow control devices (ICDs) in subterranean well operations suffer from mechanical failure due to flow-induced erosion caused by corrosive environments and high wall shear stress, leading to costly corrective operations.
Innovation Solution
A downhole fluid flow control system is designed with a flow-induced erosion resistance component, such as a sleeve member or deflector tubes, positioned within the fluid flow path to reduce or eliminate wall shear stress along the base pipe, using materials like Inconel or inert plastics to mitigate erosion and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional ICDs are used to control fluid flow, then flow restriction and flux balance are achieved, but wall shear stress increases causing flow-induced erosion and mechanical failure
Solution Approach 1:
A flow-induced erosion resistance component is introduced as an intermediary element within the fluid flow path. This component acts as a mediator that intercepts and dissipates fluid energy before it reaches the base pipe, thereby reducing wall shear stress while allowing the ICD to maintain its flow control function
Solution Approach 2:
The invention converts the harmful high-velocity fluid flow that causes erosion into a beneficial force by using deflector tubes or sleeves to redirect and dissipate the fluid energy. The erosive flow energy is transformed into controlled fluid direction changes that protect the base pipe while maintaining production functionality
2Productivity
If flow control components create flow restrictions, then flux balance is achieved, but corrosive environment combined with high wall shear leads to erosion of oxide layer and mechanical failure
Solution Approach 1:
The system employs composite material strategies by combining erosion-resistant materials (such as Inconel or inert plastics) for the flow-induced erosion resistance component with the base pipe structure. This material composite approach creates a system where the erosion-resistant component protects the oxide layer on the base pipe from corrosive attack combined with mechanical erosion
Solution Approach 2:
The flow-induced erosion resistance component provides beforehand cushioning by being positioned upstream within the fluid flow path to absorb and dissipate fluid energy before it contacts the base pipe. This protective cushioning prevents the combined corrosive-erosive attack from reaching the base pipe oxide layer
3Ease of operation
If high velocity fluid flow occurs through ICD, then flow control function is achieved, but flow-induced erosion continues until mechanical failure of the device
Solution Approach 1:
The flow-induced erosion resistance component serves as a protective intermediary that allows high-velocity fluid flow to pass through while intercepting the erosive force. This mediator enables the flow control function to operate at high velocities without transferring the erosive impact to the base pipe, thereby extending device lifespan
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 system effectively reduces or eliminates erosion-corrosion of the base pipe, thereby minimizing mechanical failures and maximizing the production of desired fluids by dissipating fluid energy and diverting fluid flow to reduce shear stress.
Implementation Method 1
a flow-induced erosion resistance component positioned within the fluid flow path between the filter component and flow control component, the flow-induced erosion resistance component being operable to reduce wall shear stress along the base pipe
Implementation Method 2
Flow-induced erosion-corrosion resistance in downhole fluid flow control systems
Data Source
AI summary
Fluid flow control systems are configured to resist erosion-corrosion and minimize wall shear stress during injection or production. A fluid flow control system includes a base pipe with an internal passageway. A housing is positioned around the base pipe to define a fluid flow path between the filter component and the internal passageway. A flow control component is positioned within the fluid flow path in order to control fluid flow. A flow-induced erosion resistance component, which may take a variety of forms, is positioned within the fluid flow path to reduce and/or eliminate wall shear stress along the base pipe. As a result, erosion-corrosion of the bases pipe is reduced and/or eliminated altogether.