HOT TAP AND SPOOL SECTIONAL REPAIR

DETAIL PROJECT
Project
24in APNA-MMC MGL Hot tap and Spool Sectional Repair
Client
Pertamina Hulu Energi ONWJ
Location
Offshore North West Java Field, Indonesia
Duration
113 days
Year
July - September 2016
Mode of Intervention
Subsea IMR 2015-2017 (Saturation Diving)
Water Depth
44m
WORKSCOPE SUMMARY

PHE ONWJ required a spool sectional repair with Hot Tap and isolation method at 24in APNA-MMC MGL existing line (51 days fixed shutdown). It was locally damaged in the area of the subsea tee near APND platform location, this was due to a dragged anchor.

Therefore OSI replace 24in APNA-MMC spool with Hot Tap and isolation method as per client instruction . OSI utilized DPII DSV Crest Odyssey 1 with saturation divers. The scope of work consisted of:

  • Pre-shutdown (Positioning and trial, as found survey, soil/ pipe preparation and etc).
  • Hot tap machine system installation.
  • 24in plidco clamp complete with 2in venting installation.
  • 24in APNA-MMC MGL existing spool removal.
  • New 24in APNA-MMC MGL Spool Installation.
  • Hot Tap machine system removal.
  • Tensioning & KaMOS Gasket Test.
  • As Built Survey.