Insulated Conduit Connectors With Thermal Breaks for Wellbores
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Solution Overview
Problem
Existing thermally-insulated conduits for conducting fluids in wellbores face challenges such as high thermal conductivity at connection points, vulnerability to vacuum loss, high manufacturing costs, and fragility of insulation materials, especially in harsh wellbore environments.
Innovation Solution
A thermally-insulated conduit (TIC) design featuring multiple layers of thermal insulation material (TIM) coupled to a metal conduit, with internal gaps and vacuum or inert gas to maintain thermal isolation, and connectors that prevent direct contact between conductive materials, allowing for thermal expansion and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If vacuum-insulated conduit is used to provide thermal insulation, then thermal insulation performance is improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent changes the physical state of the insulation medium from vacuum to inert gas (argon, nitrogen, or air), allowing for simpler manufacturing processes while maintaining effective thermal insulation through the use of low-conductivity gases in the annular space between inner and outer conduits
Solution Approach 2:
The patent replaces expensive vacuum insulation with more economical inert gas filling, accepting that the insulation may require periodic maintenance or replacement but significantly reducing initial manufacturing costs and material requirements
2Ease of operation
If threaded connectors are used to connect conduit sections, then ease of installation is improved, but thermal conduction at connection points increases
Solution Approach 1:
The patent introduces thermal break elements (insulating materials or air gaps) as intermediaries between connected conduit sections, preventing direct thermal conduction paths through the connectors while maintaining the mechanical threading for assembly
Solution Approach 2:
The patent divides the conduit system into modular sections with insulated connectors, allowing each segment to be independently insulated and connected, thereby reducing overall thermal conduction while maintaining ease of assembly and disassembly
3Loss of energy
If thick insulation layers are added to withstand thermal expansion, then thermal insulation performance is improved, but device complexity increases
Solution Approach 1:
The patent applies insulation selectively at critical locations (connection points, ends, and areas with high thermal gradients) rather than uniformly throughout, reducing overall material usage and structural complexity while maintaining effective thermal protection where most needed
4Loss of energy
If vacuum insulation is used, then thermal insulation performance is improved, but reliability decreases due to vacuum loss vulnerability
Solution Approach 1:
The patent fills the annular space with inert gases (argon, nitrogen, or air) instead of maintaining vacuum, creating a stable, maintenance-free insulation environment that is immune to vacuum loss and suitable for long-term deployment in harsh wellbore 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 TIC provides enhanced thermal insulation properties, reduces thermal energy transmission, and increases durability while lowering costs, maintaining consistent fluid temperature and preventing insulation loss, even under extreme wellbore conditions.
Implementation Method 1
at least a first layer of thermal insulation material operatively coupled to the metal conduit so that fluids within the metal conduit are thermally isolated from an environment in which the metal conduit is positioned
Implementation Method 2
creating a vacuum within that internal annular space to make a vacuum-insulated conduit
Implementation Method 3
The TICs may provide various benefits, such as increased energy efficiency, isolating hot fluids from cold fluids or operational components
Implementation Method 4
The at least first layer of TIM is operatively coupled to the TIC so that fluids within the TIC are thermally isolated from the environment in which the TIC is positioned
Data Source
AI summary
The embodiments of the present disclosure relate to a thermally-insulated conduit (TIC) for use in conducting fluids from a first location to a second location. The TIC a metal conduit; and at least a first layer of a thermal-insulation material (TIM) that is operatively coupled to the metal conduit for preventing transfer of some, substantially most or all thermal energy between inside the conduit and outside the conduit.