IMR & Decommissioning
IMR & Decommissioning
Project: LH11-1/4-1 Decommissioning
Time of completion: 2024
Project introduction: LH11-1/4-1 Oilfield locates at Pearl River Mouth Basin, about 220km southeast of HK. It produces from subsea production trees to one FPS and one FPSO. The plan is to decommissioned the FPS and FPSO before installing the new DPP and FPSO.
Scope of work:
FPSO-
Recovery of 10 x mid-water buoy, 139 x flexible pipe buoy, 150m x flexible pipe
Decommissioning of 10 x mooring leg and 4 x flexible pipe
FPS-
Recovery of 30 x buoy, 56 x cable/umbilical buoy, 2km x dynamic cable, 4 x jumper, 2 x ROV, 1 x service riser, 4 x umbilical, 1 x UTH
Decommissioning of 14km x umbilical, 11 x mooring leg, 9 x electrical flying-lead, 30 x buoy mooring chain, 2 x jumper
Project highlights:
√ First large-scale deep water floater and subsea decommissioning project (300+m)
Project: Chevron Topside Decommissioning
Time of completion: 2017
Project introduction: COOEC’s first international offshore decommissioning project, 4 topsides were decommissioned in only 12 days at Gulf of Thailand, in water depth of 70 meters.
Scope of work:
4 x topside de-commissioning, recovery, transportation & unloading
Topside Specification: YAWA module (277.66t), JKWB module (550t), FUWL module (436.8t), FUWM module (380t)
Project highlights:
√ Won the highest Safety Performance Award of Chevron for Incident Free Operation
Project:Deepwater IFUB (Umbilical) Repair
Time of completion: 2023
Project introduction: April 2023, an umbilical was found pulled out of SDA-UTA and fell to nearby seabed in deepwater gasfield. The UTH, EFL and OFL were found damaged and the production were temporary suspended. Emergency repair work was required in water depth about 520m.
Scope of work:
√ Deepwater umbilical, UTH, EFL, OFL offshore recycling, assessment, repair, replacement, test and re-installation.
Project highlights:
First deepwater umbilical repair work in China
Project: HK Offshore Met Mast Decommissioning
Time of completion: 2022.11
Project introduction: COOEC’s first suction piles offshore decommissioning project. This project use a self-elevating vessel for lifting. The structure was dismantled on vessel deck. The worksite is located in Hong Kong. The water depth is 28.7m.
Scope of work:
> Engineering design, procurement and onshore fabrication.
> Offshore removal, transportation, offloading etc.
> The total weight is about 1,056 tons, and the height is 78m.
Project highlights:
> The first suction piles decommissioning project in China.
Project: CHEVRON TFPSO Decommissioning
Time of completion: 2021
Project introduction: COOEC’s first FPSO disconnection, towing and subsea facilities decommissioning project. The worksite is located at Gulf of Thailand. The water depth is 73.7m.
Scope of work:
> Engineering design, procurement and onshore fabrication.
> The 137,000 tons FPSO was disconnected from Tantawan oil field and towing to Singapore.
> The subsea facilities include: 5 x flexible riser, 2 x umbilical, 6 x mooring chain, 2 x mid-water buoy and 4 x gravity base.
Project highlights:
> COOEC’s first oversea FPSO disconnection, towing and subsea facilities decommissioning project.
