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End users in the off-shore drilling, petrochemical, mining and quarrying industries need to improve the performance, safety and reliability of all types of rotating equipment, which are operating in potentially explosive environments. The latest ATEX European directive 94/9/EC100a for hazardous areas, which became mandatory on July 1st 2003, encompasses products intended for use in hazardous areas, while also giving free movement of goods within the EU.
Monitran's family of intrinsically safe vibration sensors meet with the criteria laid down in the ATEX Directive. Designed, developed and manufactured in the UK, they enable end-users of rotating machinery to achieve the required improvements in performance, while continuing to operate safely. The models MTN/1100IC and MTN/1107IC can be used directly with most commercially available intrinsically safe data collectors, or interfaced through standard barrier equipment, while model MTN/1185IC has a 4-20mA output ideal for real time alarm and monitoring systems.
Playing a major role in providing reliable data for predictive maintenance analysis, Monitran works closely with several key companies involved in offshore projects, including Bureau Vertias with which it has a long successful history of providing accelerometers for applications worldwide.
The Consulting Group Manager for the Bureau’s Asset Integrity Group, Dr Jonathan Baker, recommends these intrinsically safe accelerometers for a variety of applications, including trouble shooting on off –shore and gas platforms, where providing safe working conditions is paramount.
One typical application has arisen as part of a wellhead – monitoring scheme for a major player in offshore drilling. Here, when drilling new wells, there is concern that at specific depths there is a risk that a drill bit may come into contact with an existing caisson or well. This would normally involve having to shut the existing well, to ensure safety, which would obviously have massive cost implications.
By installing MTN/1100IC accelerometers in conjunction with an intrinsically safe diode box, the existing wells can be continuously monitored. The sensor will pick up the sinusoidal noise of the approaching drilling bit, so that evasive action can be taken to enable the existing wells to remain open. This method has been successfully used throughout the North Sea and further field and has proved invaluable in avoiding loss production, as well as providing a safer working environment – and who can put a price on that?
