Fixed & Floating Platforms
Offshore platforms are situated in some of the most hostile locations and need protection from extreme environmental conditions. In the North Sea they must withstand icy temperatures and huge waves. In the Gulf of Mexico, platforms are designed to withstand hurricane-force winds.
Design
GL Noble Denton offers a range of analytical and practical services specifically designed for fixed platforms, including steel jackets, gravity base structures and compliant towers. We can also supervise and evaluate fixed-platform design on behalf of an operator.
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Our in-house expertise provides:
- Metocean specialists
- Geotechnical engineers
- Environmental specialists
- Installation engineering, modification and fine-tuning of the design
- Certification and verification authority
- Modelling and analysing of structures to define suitability over their lifetime
Innovative hydrodynamic, structural and geotechnical issues associated with fixed-platform design developments are a particular feature of GL Noble Denton’s service, specifically for:
- Ringing
- Joint designs
- Fracture-mechanic-based fatigue design
- Foundation design
- Seismic analysis
- Fire and blast analysis
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Build
Platform construction is a global business and requires design plans, plant and equipment to be sourced from several locations. Through our global network, GL Noble Denton engineers can attend on site and ensure the structure is built to the required safety and quality standards.
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For example, this is particularly critical for gravity base structures made through slip-forming (continuously poured concrete providing the seamless walls of a platform jacket).
Marine warranty activities can begin in the build stage where the construction process is carefully monitored to ensure all necessary design requirements for the temporary phases are satisfied.
As field development project managers, we also provide:
- Fabrication supervision
- Procurement services
- Cost and schedule planning
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Install
Transporting and installing offshore platforms are complex and delicate operations, and great care must be taken to ensure substructure and topsides are loaded out, transported and installed safely.
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GL Noble Denton’s marine warranty surveying activities include an independent review of asset integrity along with installation procedures.
Our expert, proven capability for this important stage covers:
- Transporting and installing jackets and topsides
- Float-over engineering and execution using dynamically positioned vessels
- Process-facilities commissioning management
- Turnkey jacket lead-out and sea-fastening services
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Operate
GL Noble Denton has developed its own, unique structural integrity management system to ensure the most up-to-date structural models and inspection data are easily accessible. Reliability and safe design of all engineered structures is vitally important to prevent catastrophic failure and ensure continuous profitable operation.
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This enables emergency response activities to be performed on a 24/7 basis, maintaining production uptime as far as possible. The consequences of structural failure can be tragic in terms of loss of life and financially crippling due to loss of production and revenue.
Our experience of managing platforms producing over 1.5 m bbl./day and familiarity with advanced structural-analytical models enables GL Noble Denton to provide regular assessment of asset integrity.
Our services extend to cover most fixed-platform operations including analytical and operational support:
- Work-over operations
- Bridge-linked activities with support vessels
- Ship-impact assessments
- Repairs of platform damage
- Corrosion studies
- Life extension and abandonment / removal
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GALIOM
GALIOM is an asset integrity management (AIM) software tool which determines risk and shows the technical integrity of an asset. Moreover, it develops a targeted inspection and maintenance programme. GALIOM is a combined AIM and risk-based inspection tool that can be used for any oil, gas, or petrochemical facility or power plant.
