ADNOC – Conversion Of Wsp-Zcc Wi Pipeline to Oil Pipeline (Supply of Concrete Mattress)

ULO Systems FZC were contracted by ADYARD Abu Dhabi to manufacture and supply 166 Articulating Concrete Mattresses (ACM) for the “18 inch PIPELINE MITIGATION PROJECT” for ADNOC Offshore. The Project involved converting an 18” Pipeline from Gas/ Water Injection to Oil Service, for a temporary phase of 1.5 years.  The conversion scope included pipeline free span correction, pipeline stabilization and pipeline buckle mitigation.

At the design engineering stage, ULO Systems provided its engineering support to ADNOC Offshore and Worley pipeline engineers to optimise the mattress system and its implementation. The ACM were 12 meters long and 4 meters wide and were made up of three (3) types.

Type 1 – Combination mattresses made up of 0.5 m high blocks and 0.9 m high blocks

Type 2 – Mattresses with a uniform thickness of 0.6 m

Type 3 – Mattresses with a uniform thickness of 0.9 m

The mattresses are one of the largest if not the largest mattresses available in the industry with weights in air ranging from 29 metric tonnes to 40 metric tonnes.The entire mattress production was completed in less than 2 months in spite of the ongoing COVID -19 challenges.