Flow Assurance Heat Management Systems in Subsea Flowlines

Heat management systems is a practice of maintaining the fluid temperature inside the flowline well above the Hydrates Formation Temperature and WAT. The heat management system is regarded as very valuable in flow assurance solutions due to its cost-effectiveness. As the oil and gas fields progress into deep water, there is an increasing demand for a heat management system to stop the formation of hydrate sand wax in the subsea systems. Therefore, a good heat management plan is selected based on the needed cooldown time, water depth, U-value, and temperature range. The heat management systems consist of active heating and passive insulation. The active heating system uses external heat sources like hot water, direct electrical, and electrically heat-traced flowline to warm the produced fluid while the passive insulation system utilizes material like Mineral wool and Polyurethane with a low thermal conductivity to lower heat loss to the environment.

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