Carbon Fiber Composite Heating Layer for Deep-Sea Hydrocarbon Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lines for transporting hydrocarbons in cold or deep-sea environments face issues with freezing, congealing, and paraffin formation, which can cause plugging, and existing heating methods using copper conductors are inefficient and lack mechanical strength.
Innovation Solution
A hydrocarbon transport line with a hollow tube having a heating layer of carbon fibers embedded in a polymer material, an insulating layer, and a reinforcing layer with carbon fibers, along with electrical power supply means to heat the tube, enhancing mechanical strength and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If copper conductors are used for heating the line, then electrical heating is achieved, but mechanical strength is insufficient and heating efficiency is low
Solution Approach 1:
The patent applies composite materials by embedding carbon fibers in a polymer matrix to form a heating layer. This composite structure provides both the electrical conductivity needed for heating and the mechanical strength required to withstand external pressures, simultaneously resolving both requirements rather than choosing between copper conductors (weak mechanically) or solid polymer (poor heating efficiency).
Solution Approach 2:
The patent changes the material parameter from copper conductor to carbon fiber composite, which alters both the mechanical properties (increasing strength) and thermal properties (improving heating efficiency through higher electrical resistance and better thermal distribution). This parameter change enables the material to fulfill dual functions of structural support and efficient heating.
2Strength
If traditional heating layers are used, then heating function is provided, but mechanical strength under external pressure is insufficient for deep offshore use
Solution Approach 1:
The reinforcing layer uses a composite material consisting of carbon fibers embedded in polymer material, which provides exceptional mechanical strength to withstand external pressures greater than 200 bar. This composite structure maintains the integrity of the fluid transport line under extreme deep-sea conditions while the embedded carbon fibers contribute to both structural reinforcement and heating functionality.
Solution Approach 2:
The patent employs a multi-layer cylindrical structure where each layer is wound or applied in concentric layers around the central tube. This curved, layered configuration distributes external pressure uniformly across the structure, enhancing the line's ability to withstand deep-sea pressures while maintaining structural integrity.
3Strength
If heavier materials are used to increase mechanical strength, then pressure resistance improves, but transport and installation become more difficult
Solution Approach 1:
The patent uses carbon fiber composite materials which have a high strength-to-weight ratio. The carbon fibers provide exceptional mechanical strength to withstand deep-sea pressures, while the polymer matrix keeps the overall density low. This composite approach enables the line to be both mechanically strong and relatively lightweight, facilitating easier transport and installation compared to traditional metal-reinforced lines.
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 line can withstand high external pressures, is lighter, and more efficient in heating, allowing for deeper offshore use while maintaining fluid transport integrity.
Implementation Method 1
a heating layer on the tube, and comprising carbon fibers embedded in a polymer material... electrical power supply means intended to bring an electrical current to said heating layer, said electrical current flowing in said heating layer in order to heat the tube
Implementation Method 2
carbon fibers embedded in a polymer material... electrical current flowing in said heating layer in order to heat the tube
Data Source
AI summary
The invention relates to a line for transporting a hydrocarbon. The line comprises a hollow tube having an electrically insulating outer surface, a heating layer with carbon fibers embedded in a polymer material, an electrical insulation layer arranged on the heating layer, a reinforcing layer with carbon fibers embedded in a polymer material arranged on the electrical insulation layer, and power supply means for feeding an electrical current to the heating layer for heating the tube.