In the ever-evolving offshore oil and gas sector, adaptability and engineering precision are the keys to staying ahead. Grandweld Shipyards recently demonstrated both with the successful conversion of AM Passion—a former Platform Supply Vessel (PSV)—into a fully operational Well Stimulation Vessel for SLB. What makes this project particularly noteworthy is not just the technical complexity but the sheer scale, precision, and speed with which it was executed.

A Vision Transformed into Reality

Awarded in June 2024 through a competitive tender by SLB, the AM Passion conversion project marked the beginning of a transformative journey for both the vessel and Grandweld’s engineering team. The work was executed under the stringent oversight of two of the world’s leading classification societies—ABS and IRS—ensuring full compliance with international standards.

While the physical conversion began in July upon the vessel’s arrival at Dubai Maritime City (DMC), Grandweld had already initiated detailed design, procurement, and prefabrication activities. This head-start allowed for seamless mobilization and an accelerated execution schedule.

Engineering Complexity at its Finest

At the heart of the conversion was the integration of new mission-critical systems and the removal of legacy components. Grandweld dismantled several existing structures—including deck cranes, cement tanks, and rescue equipment—to make way for over 400 tons of new steel structures, meticulously fabricated and installed. Key additions included:

  • Well Test Workshop
  • High-Pressure Pump Room
  • Acid Storage Facilities
  • Proppant Silos and Blenders
  • Switchboard and Generator Rooms
  • Dedicated Laboratory for offshore analysis

This wasn’t just a physical transformation; it was a complete reimagination of functionality.

Smart Piping with 3D Precision

More than 50 unique piping systems—spanning both stainless steel and carbon steel—were modeled in 3D before fabrication. This digital-first approach minimized spatial conflicts, ensured smoother installation, and significantly reduced project timelines. These pipelines are now responsible for handling everything from seawater and acid to nitrogen and proppants during stimulation operations.

Crew-Centric Modifications

A vessel’s performance depends as much on its people as its machinery. Grandweld repurposed multiple accommodation areas to serve new operational needs, including a state-of-the-art STIM Control Room, alongside wellness facilities such as a recreational room and gym, recognizing the importance of crew welfare during long offshore deployments.

Precision Mechanical & Electrical Integration

Over 50 major mechanical systems—including high-pressure pumps, nitrogen generators, HVAC units, cranes, and burner booms—were installed with engineering precision. In parallel, Grandweld provided skilled manpower to support SLB’s electrical team with cable routing, terminations, and integrations, ensuring robust functionality across all systems.

Heavy Lifts, Zero Margin for Error

Some components, such as the heavy-duty cranes and pump units, required intricate heavy-lift operations with cranes of up to 500 tons in capacity. Grandweld’s team developed detailed rigging and lift plans to ensure every lift was performed safely and efficiently. These carefully orchestrated maneuvers underscore the project’s technical rigor.

Safety Beyond Compliance

With over 280,000 manhours logged, the AM Passion project recorded zero Lost Time Incidents (LTI)—a testament to Grandweld’s unwavering commitment to Health, Safety, and Environment (HSE) protocols. Every task, from the smallest weld to the heaviest lift, was conducted with safety at the forefront.

Delivering Excellence – On Time, Every Time

Completed in less than nine months, the AM Passion conversion is not just a case study in successful project delivery—it’s a reflection of what Grandweld Shipyards stands for: engineering excellence, relentless execution, and uncompromised safety.

As the offshore industry demands increasingly specialized assets, Grandweld continues to raise the bar. The successful transformation of AM Passion is not just the conversion of a ship; it’s the conversion of expectations.