• Australia
  • Oceania
  • Asia-Pacific
Case Study

Christmas Tree and Guard Installation

Christmas tree installation

By utilizing specialized vessels equipped with advanced technology, the installation process of installing wellheads from MSVs instead of Rigs may offer project managers a faster and more efficient, option to meet project timelines. Along with cost-effectiveness, this solution offers increased flexibility, and reduced environmental impact from avoiding the complexity of Rig set ups. Which is why Shelf Subsea were invited to this project.

Services provided during the project.

The work was performed on the Southern Star, with two installed ROVS (Q21 QASAR and Panther) along with integrated Survey and positioning systems. Project activities and equipment included:

  • ROV intervention
  • Subsea Survey
  • Subsea Positioning
  • Subsea Cranage
  • Subsea lift analysis and engineering
  • Provisioning of bespoke rigging and installation aids.
  • Various project equipment including Jetting systems, cutting tools, ROV dredging systems, specialised ROV tools and third party operated pressure testing equipment.

Project outcome

Over 18 days weeks with 20 dives of the of the Panther and 38 dives of the Q21, 116 COVID Tests across the 33 Marine crew and 28 project crew Shelf successful Installed 2 Christmas trees and 3 debris canopy protectors, as well performing as found and as built surveys and debris removal at site. We are happy to note there were no recordable incidents or medical treatment cases. The project saved the client both time and money compared to alternative options.

The project required a highly reliable, stable vessel with extensive clear back deck, excellent Directional Positioning, and excellent active heave compensated cranage. The Southern Star was selected for this project as meeting all these parameters. The project was another that was successfully mobilised and executed during the COVID period requiring dedicated and  skilled project management and planning to navigate the multi-jurisdictional compliance requirements for vessel and personnel movement.