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A New Method For Flushing of Subsea Production Systems Prior to Decommissioning or Component Disconnection by Sevillano, Lucas Cantinelli; Stanko, Milan; Sangesland, Sigbjoern is a scholarly article available to read on EtoBox.

What is A New Method For Flushing of Subsea Production Systems Prior to Decommissioning or Component Disconnection about?

This paper outlines a novel subsea flushing system which uses a subsea tool to improve the performance of the flushing operation. The new method outlined in this paper uses a small-diameter, high-pressure supply line and a subsea deployed tool containing a pump which recirculates the cleaning fluid through the component or system to be retrieved. The main benefit of this method when compared against conventional practices is that it allows achieving higher fluid speeds inside the subsea equipment being flushed, while injecting smaller flow rates from the surface vessel. The high fluid speeds are achieved with the recirculation pump. The higher fluid speeds ensure efficient sweeping of hydrocarbons from complex paths. A reduced flow rate from the surface vessel also allows a small diameter high pressure supply line to be used, which allows for reduced weight and storage. The study is a numerical simulation of the method applied to a subsea jumper geometry. The injection flow rates required to achieve an efficient flushing were determined from previous experimental work. Calculations were made to estimate the pressure and power requirements for performing the flushing operation as we

Author

Sevillano, Lucas Cantinelli; Stanko, Milan; Sangesland, Sigbjoern

Published

2024

Language

EN