Pipeline Burial

The Project

JBS were contracted by Excelerate Energy USA to provide an urgent Sea Axe CFE standard system to the Moheshkhali Floating LNG Terminal offshore Chittagong, Bangladesh. The project entailed lowering an LNG pipeline, approximately 3000m long, to a 3m depth cover, to minimise future remediation works due to uncovering.

The Challenge

Due to the urgency of the project JBS airfreighted the Sea Axe CFE system to Singapore to join the vessel prior to its departure to the Bay of Bengal. Working in extreme conditions with currents, in excess of 4 knots the controllability of Sea Axe ensured that the excavation was completed on time.

The Solution

Sea Axe was mobilised to the diving support vessel Fire Opal and operated in water depths of approximately 35 metres. Soil conditions were found to be firm clay in some sections. The JBS standard equipment system is utilised for soils strengths up to 80 kPa with the ancillary system added for soil strengths between 80 kPa and 200 kPa. An electric power pack was used for this project replacing the traditional diesel power pack. The electric power pack produces zero emissions and removes the requirement for diesel. It produces less noise and is the most environmentally acceptable power pack available.