DETAIL PROJECT
- Project
- 8in MGL YA-B1C Riser and Spool Sectional Repair
- Client
- Pertamina Hulu Energi ONWJ
- Location
- Offshore North West Java, Indonesia
- Duration
- 10 days fixed shutdown duration
- Year
- April 2017
- Mode of Intervention
- Subsea IMR 2015-2017 (Saturation Diving
- Water Depth
- 40.5m
WORKSCOPE SUMMARY
PHE ONWJ required a riser and spool sectional repair at 8in MGL YA-B1C the existing line (10 days fixed shutdown). It was found several defects exceeding the maximum allowable longitudinal extend of corrosion. Since leak cannot be repaired by clamp, the riser and spool needs to be replaced to secure the production target of Bravo Field.
Therefore OSI replace 8in MGL YA-B1C riser and spool as per client instruction. OSI utilized DPII DSV Crest Odyssey 1 saturation diving. The scope of work consisted of:
- Pre-shutdown (Positioning and trial, as found survey)
- De-oiling & Isolation Shutdown
- Seabed/pipeline preparation and etc)
- 8in MGL YA-B1C Existing riser and spool removal
- New 8in MGL YA-B1C riser and Spool Installation
- Tensioning & KaMOS Gasket Test
- As Built Survey.