Stowen Group explain the challenges working on confined-space thruster removals.

Colin Stewart and the Stowen Technical team have been challenged with confined space thruster motor removals (Each weighing 15Te). Colin explains the challenges facing many vessel owners and operators with heavy equipment installed deep in the hull. More importantly Colin explains the solution and where Stowen can help. 

Stowen was approached by a major equipment supplier to undertake a removal of up to 8 thruster motors in the hull of a vessel in the Gulf of Mexico. Having had similar experiences with this, we were well placed to support the client right from the start. Mobilising 2 multi skilled technicians Stowen set about a detailed survey assessing the location of the motors, detailing lifting points (or lack of), electrical and mechanical disconnect and lay down areas for service.

It was soon ascertained that additional lifting points would be required to enable the motor to be not only removed, but rotated through 90 degrees and set down to undergo mechanical maintenance. 

The key value point for the client in engaging Stowen was the ability for Stowen to undertake a true turnkey approach to the project. Following the survey, we entered the engineering and planning phase. Using the detailed survey?notes, we were able to work with the vessel?OEM in engineering structural reinforcement?and lifting points to be installed. In tandem with this structural aspect, Stowen project team set about the detailing the rigging and lifting plan for removal, set down and reinstallation.

The advantages of an in-house multi-disciplined team were prevalent. Working to extremely tight timelines, Stowen compiled a comprehensive engineering study and Construction work pack including: lift plans; electrical and mechanical disconnects and reinstatement; project plan; materials and equipment list and commissioning documentation. 

For more information contact: Technical Director Colin Stewart