Hallin Marine has completed the replacement of nine mooring lines for a subsidiary of China Offshore Oil Engineering Company (COOEC).
COOEC Subsea Technology contracted Hallin Marine to offer support for the replacement of nine lines below the HYSY111 floating production, storage and offloading vessel.
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Hallin said this is the first time in the oil and gas industry that all FPSO mooring lines have been replaced as one continuous activity.
Previously, only one damaged mooring line was replaced at any time.
Hallin Marine service delivery director Phil Chamberlain said: "The HYSY111 FPSO mooring replacement project consisted of several phases of work beginning with piles installation then laying and pre-tensioning new lower chain segments by COOEC.
"Hallin then provided subsea services to cut and remove the old mooring lines, followed by laying and hooking up new upper mooring wires."
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By GlobalDataCOOEC completed the engineering analysis and developed the main project procedures in the last phase, offering specialised tools for the subsea mooring line connection.
Hallin delivered the DSV Windermere and dive team as well as subsea operational solutions for the mooring.
Chamberlain said: "Hallin’s involvement commenced at an early phase with an operational and engineering presence on the ground in Shenzhen, China.
"COOEC and Hallin teams worked together in developing the optimal technical solution, while ensuring the critical safety elements of undertaking this work on a live platform were addressed."
Image: Hallin said this is the first time that all FPSO mooring lines have been replaced as one continuous activity. Photo: courtesy of Hallin Marine.
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