72 www. bus- ex. com September / October 09 Some of the cables JDR makes can be as long as 50 kilometres in a single length, supplied to customers from a turntable or carousel that can measure up to 30 metres in diameter. That's a pretty bulky item to shift; and transportation from Littleport to a deep- water facility is, at best, inconvenient for the company and for other road users. So at the beginning of 2008, the company began developing a new facility at Hartlepool, located on the UK's east coast, that will specialise in the production of the larger- specification cables. " We developed into the production of subsea power cables about eight years ago. We did those from Littleport- up to about 100 tonnes- and we are continuing to serve that market from our original site," says Phelan. " In 2005 we supplied our first offshore wind farm, the Beatrice demonstrator." The cables are rated to 33 kilovolts and JDR's specialism is the pull- in process, which involves connection to the turbines and to the control station. It recently won a contract to supply an offshore wind farm containing up to 140 turbines, which means 280 cable ends. " We have been using our expertise to develop the termination and pull- in systems to make fast, efficient and " We have been using our expertise to develop the termination and pull- in systems to make fast, efficient and reliable cables and systems for the offshore wind market"
" We make dynamic cables, which are towed by ships, submarines, scientific and research boats, or tied to a buoy and connected from the seabed to a satellite antenna," explains Han Van Veen, managing director of JDR Marine Cables, based in Krimpen aan de Lek, near Rotterdam. It too has a quayside facility, which it moved into in 2007. It is the only European producer- and is a leader- in its market for torpedo defence systems and submarine warfare. But 60 to 70 per cent of its business is seismic arrays for the oil and gas markets. " If you have a tow cable or remote equipment you require information from, you want to have the cable as small as possible, for the least resistance and weight," says Van Veen. " It has to be tough and reliable; the last thing a customer wants is for activities to be held up because one of the cores has failed." reliable cables and systems for the offshore wind market," Phelan explains. " Our plant at Hartlepool is now making product of 100 to 200 tonnes, which will be spooled directly onto the transport reel and loaded at the quay by crane. We can supply up to 2,200 tonnes in a single length, spooled directly onto the ship at the quayside. We expect there will be a continuing trend to longer and larger cables, able to operate at higher pressures and serving oil and gas fields in deeper waters. Littleport will focus on intervention cables, with powered reels, the kind that are temporarily deployed and then brought back on- board." The cables the company makes are complex pieces of equipment, containing within a single housing copper wire, fibre optics and other cores that carry all the information needed to run an energy field remotely. JDR also has an operation in the Netherlands, which specialises in seismic cables. JDR Cable Systems September / October 09 www. bus- ex. com 73