14
CASE STUDY: INPEX SCM FUNCTIONAL TEST
As part of Systems Integration Testing (SIT) in 2025,
an INPEX-operated, Baker Hughes-designed
Subsea Control Module (SCM) became the first
equipment to complete full electrical functional
testing in the HCUF, demonstrating capability on
one of the most complex and sensitive subsea
assets.
Test configuration and method
● Two custom-built Electric Flying Leads (EFLs)
were connected between the 2T SCM and an
electrical flange to verify full electrical functionality
under pressure.
● The SCM, installed on EUT frame assembled
inside the HCUF’s Kraken hyperbaric chamber, was
tested to 1.1 × rated depth of 300 m sea water
(MSW).
● Chamber pressure was increased in 50 MSW
increments, with full electrical functionality verified
at each step.
● All power, signal and control circuits performed
as expected under simulated subsea pressures.
STANDARDS AND ASSURANCE
By executing the first SCM test in the HCUF, a
precedent was set in line with the latest API 15F (5th
edition) requirement that states SCMs and other
subsea units containing pressure compensation
and/or electronic components are to be pressure
tested after every repair. The SIT evidenced
measurable reductions in testing lead times and
increased transparency across repairs, inspections
and logistics directly supporting IRM schedules with
faster turnarounds and auditable verification.
BEYOND TESTING – SUBSEA TECHNOLOGY
DEVELOPMENT
The HCUF forms part of Matrix’s wider subsea
technology portfolio. Recent developments
include:
●High Performance Distributed Buoyancy Module
(DBM) Clamp — Matrix has developed a new DBM
Clamp that doubles capacity compared to previous
designs. This innovation can reduce the number of
modules required, lowering transport costs,
installation time and vessel usage.
●Matrix Ultralight GRP DBMs – Engineered to
maximise uplift and minimise DBM count, these
modules reduce installation time, freight, and
logistics costs. Their tighter geometric tolerances
improve interfacing with module handling systems.
Certified to API-17L1:2nd edition, they are ideal for
SURF applications.
●Matrix LGS VIV and Drag Suppression Technology
— Developed with AMOG Technologies, this
biomimetic grooved profile disrupts vortex formation
to reduce hydrodynamic loading.
HYPERBARIC TESTING