BAKU, Azerbaijan — Mammoet has issued an update on the construction of the production, drilling and quarters (PDQ) platform for the Azeri Central East (ACE) project in the Caspian Sea.
This is the latest phase of the development of the Azeri-Chirag-Deepwater Gunashli Field, operated by bp.
Azfen, a joint venture between Turkish contractor Tekfen and SOCAR, prefabricated the modular drilling support module (MDSM) and drilling equipment set (DES) at their yard near Baku.
Planning for integration with the platform started in 2019, when Mammoet was awarded a detailed engineering study for the process, including the heavy-lift operations, movement and stability calculations and risk assessments. Earlier this year the company started work on the physical integration.
The work scope included weighing, transport, jacking and skidding operations for the 2,400-t DES module (32 m long, 22 m wide and 80 m tall) and the 2,350-t MDSM module (43 m long, 20 m wide and 20 m high) using Mammoet’s jacking and skidding systems, in combination with self-propelled modular transporters (SPMTs).
For the seven-week operation, integration started with weighing of the MDSM module. This was then jacked up using the Mega Jack 800 so two modular jacking beams could be moved underneath it.
Next, the heavy skidding system, comprising six 800-t skid shoes and a skid track, was installed on top of the beams, with the entire combination subsequently positioned onto 120 axle lines of the SPMT, so it could be moved 100 m across the site from the fabrication location toward the platform.
The combination was then placed above the Mega Jack 800, pre-installed beside the platform, followed by jacking up to a height of 15 m, before the MDSM was skidded onto the platform.
An additional set of skidding equipment was employed to skid the module in a transverse direction toward its final position. The module was then transferred onto hydraulic jacks for final setdown. Once the operation was completed, the team repeated the process with the DES module.
Mammoet deployed its specialists from locations including the Netherlands, UK, Spain, UAE and Kazakhstan for the campaign.
The company also will support the project’s final stage next year, which will involve the jack-up and load-out of the complete PDQ platform (expected to weigh 20,750t, using the Mega Jack 5200 system.