Case study

Shell Appomattox: Delivering Complex Offshore Pre-Commissioning with Confidence

Executing high-pressure dewatering and testing operations across multiple scopes in the Gulf of Mexico.

June 29, 2020

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Overview

EnerMech supported Shell’s Appomattox development in the Gulf of Mexico by delivering a large-scale pre-commissioning campaign across multiple offshore scopes. The project involved pigging, hydro-testing, and high-pressure dewatering of a 55-mile gas export pipeline and associated infield flowlines and risers.

A 10,000 scfm nitrogen spread—the largest ever deployed in the Gulf—was mobilised, alongside a Remote Flooding Console for high-flowrate operations. A 36-person multi-disciplined team executed 19 operations across five offshore locations, completing over 18,000 man-hours without incident. EnerMech’s integrated approach reduced costs, improved efficiency, and ensured safe, on-time delivery.

Key Highlights

  • 10,000 scfm nitrogen spread deployed—the largest in Gulf of Mexico history

  • 19 operations completed across five offshore locations

  • 18,000+ man-hours delivered incident-free

  • 36 personnel deployed across four unique scopes

  • 3D engineering design used to reduce cost and accelerate planning

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