Safety limit of super-long inner pipe in coaxial borehole: A thermal-hydraulic-mechanical coupled algorithm

Key Points

• The safety limit of the super-long inner pipe is critically evaluated, revealing potential risks in thermal-hydraulic interactions.
• Key evidence indicates that variations in pressure and temperature affect the stability of the inner pipe significantly.
• Assessment of thermal-hydraulic-mechanical parameters through a coupled algorithm enhances understanding of failure risks.
• These findings highlight the importance of rigorous evaluation methods to ensure safe operation in borehole systems.