Case study

Milestone Deepwater Project US Gulf of Mexico

Delivering complex pipeline pre-commissioning scopes across a multi-vessel operation – EnerMech's landmark deepwater pipeline pre-commissioning project in US Gulf of Mexico

April 30, 2025

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In 2023, EnerMech delivered a complex pre-commissioning campaign for a major US energy infrastructure company in the Gulf of Mexico. The project involved deploying the largest nitrogen membrane spread in company history—10,000 SCFM—at a water depth of 8,800 feet. EnerMech provided a full turnkey solution, integrating multiple services including flooding, cleaning, gauging, hydrotesting, and dewatering. By eliminating third-party dependencies and operating from its Houston base, the team ensured safe, efficient execution and timely delivery. The project reinforced EnerMech’s deepwater capabilities and strengthened its relationship with the US midstream operator.

Key Highlights

  • 8,800 feet water depth

  • 24 miles of 18" water export pipeline

  • 25 miles of Gas export pipeline

  • 10,000 scfm nitrogren spread

  • 30 offshore personnel (field supervisors, engineers, technicians)

Scope included:

  • Flooding, cleaning, gauging, hydrotesting, dewatering

  • Custom pig launcher/receiver design and fabrication

  • Remote Flooding Console (RFC) and Subsea Test Pump (STP) deployment

  • High-flow triplex pumps for oil export pipeline

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