A purpose-designed BOP handling system comprising twin air-operated monorail hoists, with a joint lifting capacity of 200 tonnes has been supplied by J D Neuhaus. These hoists are a special compact design which has been developed to suit on-site operational requirements and each hoist represents a 45% reduction in the horizontal profile length compared to the JDN standard EH-100 product.
These compact hoists run in parallel on two overhead beams in excess of 22 metres in length. Both hoists incorporate two trolleys, each with a 50 tonne load rating, providing a total 100 tonne lift capacity per hoist. Each hoist is also fitted with a copper-coated bottom block and clevis (providing increased spark protection), together with a galvanised chain box. The overhead support beams incorporate a rack and pinion drive for the trolleys, ensuring that even inclines up to 2.5° can be negotiated. The total traverse distance is in excess of 18 metres, while the lift height available is 15.25 metres.
A single Neuhaus LN trolley with a 50 tonne load capacity has also been incorporated which is used to provide a BOP fixture device during maintenance works.