HIU Subsea Control Repair

DETAIL PROJECT
Project
Hiu Subsea Controls System Repair
Client
ConocoPhillips
Location
Natuna Sea Block B, Indonesia
Duration
10 days
Year
August 2014
Mode of Intervention
Saturation Diving Services
Water Depth
90m
WORKSCOPE SUMMARY

On October 13th , 2012 the power and signal at Channel A of the Kerisi/Hiu subsea control system tripped on low LIM (Line Insulation Monitoring). On August 26th 2013 Channel B tripped for the same reason. COPI chose to override the LIM in order to keep the wells producing while carrying out diagnostic tests on the Kerisi CPP. The tests concluded that the problem was located on the subsea section of the control system.

Therefore OSI carried out subsea controls system repair as per client instruction . OSI utilized DPII DSV Crest Odyssey 1 saturation diving.

The scope of work consisted of:
  • As found survey
  • The electrical fault findings
  • Replacement of the EFLs and SCMs
  • As Built Survey