Installation of Pipelines (2014-2016)


Kashagan field, located in the Kazakhstan sector of the Caspian Sea, extends over a surface area of approximately 75 kilometers by 45 kilometers. The development of Kashagan, in the harsh offshore environment of the northern part of the Caspian Sea, represents one of the largest and most complex industrial projects currently being developed anywhere in the world. ERSAI Caspian Contractor LLC has been awarded by the North Caspian Operating Company (NCOC) an engineering & construction contract for the development of the Kashagan field. This scope consists of the construction of two pipelines with a diameter of 28 inches and total length of 95 kilometers each pipeline running from the D island in the Caspian Sea to the Karabatan onshore plant in Kazakhstan. Each pipeline has an offshore length of 65 km., max. W.D. 4 m.

The scope of work includes the engineering, the conversion and the preparation of the installation vessels, the dredging, the installation, the burial and the pre-commissioning of the pipelines.


28" SOUR GAS TRUNK LINE FROM ISLAND D TO ONSHORE PROCESSING FACILITIES

  • Carbon Steel L415 X60 grade; W.T. 15.9 mm
  • Alloy 625 internal cladding; W.T. 3 mm
  • Anticorrosion coating: 3LPE Thickness 3.5 mm + 0.5 mm rough coating; density 981 Kg/m3
  • Concrete coating: Thickness 50 mm; density 3040 kg/m3
  • Total Length: 95 km (65 km offshore portion)
  • Shore pull length: 10,500 m


28" SOUR OIL TRUNK LINE FROM ISLAND D TO ONSHORE PROCESSING FACILITIES

  • Carbon Steel L415 X60 grade, W.T. 15.9 mm
  • Alloy 625 internal cladding, W.T. 3 mm
  • Anticorrosion coating: 3LPE Thickness 3.5 mm + 0.5 mm rough coating; density 981 Kg/m3
  • Concrete coating: Thickness 50 to 80 mm; density 3040 kg/m3
  • Total Length: 95 km (65 km offshore portion)

ADDITIONAL WORKS


N.1 18" production pipeline, transporting multi-phase well head fluid between Island A and Island D. In detail, the pipeline route extends in between the chemical umbilical from Island A to D and the 20" production pipeline between EPC4 and Island D. The scope of work includes the engineering, the conversion and the preparation of the installation vessels, the dredging, the installation, the burial and the pre-commissioning of the pipeline.

Pipeline Data:

  • Total length: km. 6
  • Diameter: 18"
  • Pipe material: Carbon Steel L415 X60 grade + Alloy 625 internal cladding
  • Wall thickness: 22.2 mm (CS) and 3 mm (Clad)
  • Anticorrosion coating: 3LPP Thickness 3.5 mm + 0.5 mm rough coating; density 981 Kg/m3
  • Concrete coating: thickness 60 mm; density 2350 kg/m3


ERSAI Caspian Yard Scope of Work:

  • ERSAI 1 Conversion to Pipe Laying Barge (including Stinger)
  • Upgrading Castoro 12 & 16
  • Double Joint Plant
  • Floating Units


Involved Fleet During Project Execution:

Bautino 1 SWT barge

Bautino 2 Tie-in Barge

Castoro 12 Shallow Water Pipelay Barge

Castoro 16Trenching Barge

ERSAI 1 Construction Barge ERSAI 2 Crane Barge

ERSAI 400 Flotel Barge

tough projects in safe hands