Bisso Marine completes deep dives in Gulf of MexicoProjects and Operations // November 17, 2016
Bisso Marine recently completed a two‐month saturation diving campaign in the Gulf of Mexico. Using its construction barge Bisso Subsea Vision, configured with a 12‐man ABS-classed 1,000ft (300m) saturation system, the company undertook a range of subsea infrastructure services including several subsea abandonments in water depths ranging from 300ft (91m) to 723ft (220m).
Other work included a Reverse 'J' recovery of several miles of unpiggable 6in pipeline from 400ft (122m) of water. The 6in pipeline was lifted vertically through one of the moonpools on Bisso Subsea Vision. The pipeline was vented, saw cut and scrapped within an enclosed decommissioning system designed to capture the contents of the pipeline.
The same vessel also recently completed the lay and burial of several miles of bundled pipeline in the Gulf of Mexico in less than 200ft (60.9m) of water. After the vessel moved on to its next decommissioning assignment, the bundled pipeline tie‐ins were due to performed using the company’s four-point DSV Jospeh Bisso.
The fully classed 12‐man saturation system on Bisso Subsea Vision has a three‐man bell deployed through a moonpool and a side‐launched hyperbaric rescue chamber (HRC). The vessel is configured with two pedestal cranes, the main crane having a 300 ton capacity and the auxiliary crane having a 60 ton capacity. The barge also has an eight-point mooring system capable of working in 1,000ft (300m).