Pre-Commissioning & Decommissioning End-to-End Offshore Asset Lifecycle Solutions
Offshore Transition Services
Tethys Plantgeria provides integrated pre-commissioning and decommissioning services for offshore oil & gas assets, ensuring regulatory compliance, operational safety, and environmental protection throughout the asset lifecycle.
Pre-Commissioning
Comprehensive readiness verification for new offshore installations prior to first production:
- Pipeline flooding, gauging, and cleaning
- Hydrotesting and leak detection
- System flushing and chemical treatment
- Commissioning spool installation
- Safety system testing
Decommissioning
Safe and environmentally responsible retirement of offshore facilities:
- Pipeline plugging and abandonment
- Structure removal planning
- Subsea equipment recovery
- Seabed clearance verification
- Regulatory compliance documentation
Our Methodology
Pre-Commissioning Process
System Flushing
Pressure Testing
Leak Detection
Chemical Treatment
System Handover
Decommissioning Process
Site Survey
Well P&A
Structure Removal
Site Clearance
Specialized Equipment & Compliance
Key Equipment
- High-capacity pumping systems (10,000 psi)
- Pipeline isolation tools (mechanical and gel plugs)
- ROV-deployed cutting equipment
- Subsea debris recovery tools
Compliance Standards
- API RP 17N (Pre-commissioning)
- ISO 13628-11 (Subsea decommissioning)
- OGP Guidelines for abandonment
- Local regulatory requirements (DPR, NOSDRA)
Need Offshore Transition Services?
Our team specializes in safe and efficient asset commissioning and retirement.