In December 2011 Nautec undertook the provision of grouting materials, supply and installation of equipment, manpower and grouting works for the Jacket leg annuli at KNPG-B Jacket Structure in the Kinabalu Field Labuan, in collaboration with PetroUsaha Engineering S/B.
The Client
PETRONAS Carigali S/B.
The Scope
Nautec undertook the provision of grouting materials, supply and installation of equipment, manpower and grouting works for the Jacket leg annuli at KNPG-B Jacket Structure in the Kinabalu Field Labuan, in collaboration with PetroUsaha Engineering S/B.
The Challenges
A total of 406 Metric Tons of UHPC material was pumped into the annuli and the operations were successfully completed within schedule at 59m water depth.
The Services
A small footprint grout spread consisting of 2 mixers and 2 concrete pumps, functioning as primary and secondary/back-up pumps, was used for the grouting work. The UHPC material was pumped using 2” and 3” flexible grout hoses from the spread on the work vessel to the platform and into the jacket leg annuli via the primary grout inlet port on the grout panel.
Client Benefit
UHPC Material and the flat grout hose technique, eliminates the requirement for divers and/or ROV to install grout inlets at the sea bed, whilst ensuring timely and complete filling of even the narrowest of annuli in jacket legs and piles combinations. Grout strength verification was achieved by casting test-cubes, which were sent to SETSCO Singapore for crush testing; a process which was witnessed and verified by the client.