PIPELINE REPAIR & INSTALLATION

BACKGROUND:

The TRNC Water Supply Pipeline Project was commissioned in October 2015 and has since supplied 75 million cubic meters (19.8 billion gallons) of fresh water per year from Turkey to TRNC via a system comprising onshore dams, pipelines, reservoirs and pump stations as well as an offshore pipeline system that includes both on-bottom and suspended (tethered) sections.

On the 8th of January 2020 an incident occurred that resulted in a loss of integrity of the offshore pipeline in the suspended section and disrupted the freshwater supply to the island.

AES immediately was deployed to the incident site to perform the initial incident assessment survey and investigation.

It was found out that the offshore pipe was ruptured from the 1st transition anchor block position. The adjacent 120ton Anchor Block #2 and #3 structures were displaced laterally by more than 20m from their initial subsea positions, rupturing the suspended chain shackle.

Several scenarios were investigated, and root cause analysis were studied in the following couple months. The results were presented to the Client that led to the final repair plans.

The complex and one of a kind offshore repair project was executed involving two Offshore Support Vessels and 4 different AHTs. Offshore repair started in August of 2020 and was successfully completed in early October with the resupply of the fresh water to the island. 


Supervision and management of REPAIR PLANS from scratch to completion:

Supervised and managed all technical development activities from incident assessment, root cause analysis, to initial proposal preparations through mobilization, deployment, operation, and repair phases of Offshore Equipments & Crews.

In detail AES managed and provided:

·         Incident Survey (Read More....)

·         Investigation and analysis of the incident

·         Scheduling & Budgeting for Repair Plans

·         Development of required repair parts, components and Offshore Spread

·         Outsourcing of repair parts

·         Mobilization of Offshore Spread on Main Installation Vessel

·         Supervised entire Installation & Repair activities in Offshore

We are proud to be part of the one of a kind, challenging Repair Project. 


The Repair & Maintenance Project performed for the 80 km long Fresh Water pipeline, crossing the Mediterranean Sea, sets new standards in offshore repair and subsea installation technologies. 


10ton subsea buoys designed and procured by AES are being installed. 


500m Long HDPE Pipe being aligned and installed