HYSY 285

Type: saturation diving support vessel

Classification Society: CCS

Length overall: 125.75m

Molded breadth: 25m

Molded depth: 10.8m

Maximum draught: 7.7m

Main crane: 250 T

Capacity: HYSY 285 is equipped with DP3 dynamic positioning system and one NOV 250 T crane with active heave compensation and two 200 HP work class ROVs. It can perform underwater wellhead maintenance, well completion/workover/killing supports, underwater well abandonment, route check, underwater testing/maintenance/repair, laying of submarine pipelines and cables, ROV and saturation diving supports and other operations at 3,000m depth.

Main projects:

2018: Wenchang 9-2/9-3/10-3 Gas Fields Development Project.

2019: installation of Christmas trees in Liuhua Work Area; pre-commissioning of submarine pipelines; measurement of jumpers and installation of flying leads and suction piles for Lingshui 17-2 Gas Field Development Project.

2022: laying of cables in Changle Work Area.

HYSY 287

Type: multi-purpose offshore vessel

Classification Society: CCS & DNV

Length overall:125.75m

Molded breadth: 25m

Molded depth: 10.8m

Maximum draught: 7.7m

Main crane: 250 T

Capacity: HYSY 287 is equipped with DP3 dynamic positioning system, one NOV 250 T crane with active heave compensation and two 250 HP work class ROVs. It can perform underwater wellhead maintenance, well completion/workover/killing supports, underwater well abandonment, route check, underwater testing/maintenance/repair, laying of submarine pipelines and cables, post trenching, ROV and saturation diving supports and other operations at 3,000m depth.

Main projects:

2018: saturation diving support for Dongfang 13-2 Project.

2019: operation area pre-survey, placement of concrete blocks at intersections between subsea manifolds, block LBL arrangement, monitoring of submarine pipe-mud contacts, joint commissioning of subsea structures and other operations for Liuhua 29-1 EPCI Project.

2020: installation of jumpers, laying of umbilicals, lifting and positioning of subsea structures, laying of submarine pipelines and other operations for Liuhua 16-2 Oilfield Development Project.

2020: lifting of suction piles and jumpers, laying of electrical/hydraulic flying leads, route check, subsea wellhead testing and other operations for Lingshui 17-2 Gas Field Development Project.

2021: trenching for Liuhua 19-5 Gas Field Subsea Production Facility Protection Project and Lufeng Oilfields Regional Development Project.

2022: laying of 35 kV submarine cables and shallow water post trenching for 220 kV submarine cables for Yangjiang Qingzhou III Offshore Wind Farm.