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 Strainstall in Oil & Gas – decades of dependability |
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For over 25 years, major offshore installations have depended on Strainstall on-site services for load, stress and strain monitoring and data analysis. From basic stand-alone mooring load monitoring to comprehensive fully integrated systems which monitor vessel draft and ballast, metocean conditions, vessel loading and structural dynamics, Strainstall offers turnkey capabilities. Experienced in ABS, DNV and Lloyds certification requirements, we have the knowledge required to offer our customers the highest quality and the most dependable systems available. |
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Structural Monitoring
We supply and install sensors to monitor stress and strain in offshore structures, flare stacks, risers, pipelines, adapters, fixed and floating units. With real-time displays and off-line data analysis from strain gauges, accelerometers, thermocouples, oceanographic and meteorological instruments.
Stresses in Riser Systems
Strainstall design, manufacture and install riser stress-monitoring systems to provide an indication of riser tension, including warnings of riser disconnection from the fixed seabed equipment. All monitored data is channelled topside via umbilical or fibre-optic cables. The systems are suitable for use in deep-sea environments, measuring the stresses present at the specified strain gauge positions, during operations at water depths of up to 3000m
- Pressure compensated strain gauges
- Data acquisition systems
- Signal amplification
- Fibre optic interfaces
- High and low frequency data acquisition available
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Cumulative Fatigue Damage Monitoring
To provide advance warning of impending failure due to fatigue. Strainstall design, manufacture and install monitoring systems to investigate the effects on structures due to, for example, environmental and vibrational conditions. Systems can be designed for unattended operation, and remote data access – ideal for installations where access is limited or expensive. Systems are suitable for both safe or hazardous area use, due to the in-built intrinsically safe characteristics. The incorporated software carries out real-time processing of raw data to meet various objectives including:
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Hazardous Area Instrumentation
Primarily for the oil & gas and chemical industries. Products include intrinsically safe Ex i(a), explosion proof (Ex d) technologies and encapsulated (Ex m) products, all of which are supplied with the appropriate certification. Intrinsically safe sensors include:
- Accelerometers
- Strain gauges
- Anemometer
- Amplifier (Zone 1)
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Crane Instrumentation
Strainstall manufactures a comprehensive range of crane weighing and overload protection systems to suit different requirements. From simple displays to PC-based systems with dynamic sea state load charts, equipment may be fitted either to new cranes or retrofitted to existing cranes. Each system comprises a load cell to sense the load monitoring cell and an indicator to display the load and any control outputs that may be required. The type of load sensor used in a system will depend upon many factors including: crane design, accuracy required, headroom available etc.
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Mooring Winches
Strainstall offer a range of new and retrofit systems for winch load monitoring, to measure line tension, speed and line out, mode of operation, control parameters and facilitate emergency release. Real-time winch and anchor line data is provided during ring positioning and mooring, utilising strain gauged load cells to supply accurate measurement. PC and PLC based monitoring systems are available, and configurations range from basic stand-alone local winch monitoring packages to comprehensive mooring load monitoring and control systems. Strainstall application software is menu driven and operator friendly, and may be configured to interface with other onboard monitoring and control systems. Application software may be tailored to the customer’s requirements and is designed for long-term upgrades.
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Tendon and Riser Load Monitoring
Submersible load monitoring of tendons and risers of TLP’s, compatible with ballast control sensors, central monitoring and display or linked to platform IMMS and DCS. Monitors jackets, cranes, flare stacks, risers, pipelines and adapters, ship hulls, decks and other related structures. Strainstall provide an on-site structural monitoring and analysis service by an experienced offshore-trained field operations team, offering a complete service from design, through to installation to analysis.
Applications from a few strain gauges to multi-channel dynamic data acquisition turnkey systems are available.
- Strain gauge installation
- Structural monitoring
- Load cells & shackles
- Intrinsically safe instrumentation
- Stress analysis
- Data acquisition systems
- Crane overload and weighing systems
- Linear displacement transducers
- Rotational potentiometers
- Inclinometers
- Temperature sens
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Anchor Leg Load Monitoring
Provides real-time data on mooring tensions for all types of production vessels, including turret and conventional spread mooring installations. Load measurement is achieved by using instrumented load measuring shackles and pins, which are installed in the anchor legs using custom connection hardware. The system is capable of monitoring multiple channels simultaneously and provides a broad selection of archiving and analytical capabilities. Application software can be tailored to meet specific customer requirements, and can also be configured to interface directly with other onboard monitoring and control systems.
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Recent Projects
Recent projects include:
- Supply of offshore structural monitoring system to study stress distribution and onset of potential fatigue damage due to thermal cycling of heat exchangers.
- Continual tension monitoring of flare tower guy ropes, within a Zone 1 Hazardous Area.
- Design and installation of subsea monitoring systems for sea depths up to 3000m, using pressure compensated strain gauges to monitor riser axial loads at the BOP, indicating when riser disconnection has occurred. All monitored data is channelled topsides via umbilical or fibre-optic cables.
- Supply of a structural monitoring system to assess cumulative fatigue damage in offshore steelwork.
- Design and installation/commissioning of a monitoring system to determine bearing stresses in the link bridge on the Scott Platform in the North Sea.
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Special Projects
Strainstall engineers have specialised experience in providing load and force measurement for novel applications. What ever your requirement, we will be happy to discuss practical and innovative ways in which we can meet your needs.
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Strainstall Middle East LLC,
Member of James Fisher & Sons plc
PO Box 111007, Plot# 599-1254, Jebel Ali Industrial Area #1, Dubai, United Arab Emirates
Tel: 00971 4 880 4380 · Fax: 00971 880 4381 · Email: info@strainstall.ae
© 2006 Strainstall Middle East LLC, All Rights Reserved
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