Due to the complexity and multitude of disciplines that encompass deepwater oil & gas developments, effective planning of strategic operations is imperative in order to achieve first oil in the safest and fastest way possible.

Consult A Specialist

Steven Guy


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In order to ensure a flawless initial startup, effective interface management between key engineering areas is critical and must be maintained throughout the life of the project from the preliminary FEED phase to sustainable steady-state production.

In GATE’s experience, major issues are often not detected until the initial startup of deepwater developments, causing deferred production and consequently many expensive changes. GATE gets involved early in the design process and applies a systems-wide engineering approach that negates many of the potential issues encountered during initial startups to minimize cost and schedule impacts.

GATE has expertise in facility design, planning and execution of commissioning and start-up operations, as well as being able to provide on-site technical support during well unloading and commissioning activities. This enables a rapid response capability to unexpected events and the ability to transfer learnings to our clients.

GATE’s ability and proven track record to our client delivers a sound process to carry Mechanical Completion to Static/Dynamic Commissioning completion thus ensuring a trouble free start-up.

Use of the GATE Completion System (GCS) assures API 1FSC Compliance.

Topsides Commissioning Services

Topsides commissioning services provided by the GATE Commissioning team includes:

Planning & Commissioning Management

  • Mechanical Completion, Commissioning (Static and Dynamic) and Startup Planning and Execution per API 1FSC
  • Full Service Execution / Client Representative Oversight
  • Budgeting, POB Forecasting & Schedule Development
  • Project Systemization and Procedure Development
  • Systems Completion Management via the GATE Completion System (GCS)
  • Quality Assurance / Quality Control
  • Extensive Offshore Oil and Gas Commissioning Experience
  • Preservation Management
  • Vendor and Subcontractor Selection and Management
  • Logistics and Material Management
  • Health, Safety, Security and Environment (HSSE) Planning and Oversight
  • Permit To Work and Isolation Management System
  • Expertise in Water Injection Commissioning

Mechanical Commissioning

  • Rotating Equipment
  • High Pressure Leak Testing
  • Piping and Tubing Inspection / Cleaning and Flushing
  • Torqueing and Flange Management
  • Millwright Services

Electrical Commissioning

  • Power Generation
  • Switchgear and Distribution

Instrumentation Commissioning

  • Calibration and Integration Testing
  • Cause and Effect Testing
  • Fire and Gas
  • Telecommunications

Regulatory Commissioning

  • Procedure Development
  • Regulatory Testing
  • Interface Management

Subsea Commissioning

Planning & Commissioning Management

  • Commissioning Planning, Management and Execution
  • Full Service Execution or Client Representative Oversight
  • Subsea Project Systemization
  • Subsea Systems Completion Monitoring / Management via the GATE Completion System (GCS)
  • Quality Assurance / Quality Control
  • Extensive Offshore Oil and Gas Commissioning Experience
  • Health, Safety, Security and Environment (HSSE) Planning and Oversight
  • Integrity Management
  • Regulatory Testing (e.g. Subsurface Safety Device testing)
  • ROV Intervention
  • Vendor and Sub-Contractor Selection and Management

Umbilical Commissioning

  • Chemical / Preservation Compatibility Studies
  • Umbilical Axial Mixing Modelling
  • Umbilical Displacement Planning and Execution

Flowline / Pipeline Commissioning

  • Hydrotesting
  • Preservation (e.g. Corrosion Analysis and Prevention)
  • System Dewatering / Drying
  • Flow Assurance Modelling
  • Initial Flow-back, Buy-back and First Export Analysis and Planning