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发表于 2011-3-28 13:35
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来自： 中国黑龙江哈尔滨
ODIM CTCU and fibre ropes – have the potential to revolutionize installation work at extreme water depths.
As offshore oil and gas drilling moves into water depths of more than 2000 metres, lightweight fibre rope is revolutionizing the potential for deepwater installation and mooring.
Fibre rope is as strong as a steel wire of the same dimensions, but only a 10th of the weight in air. For instance, a fibre rope of the same length is neutral in weight for all practical purposes. This means that lightweight fibre rope can handle a substantially better payload in deep water. With its low specific weight, fibre rope makes it possible to use winches and handling equipment with much smaller power requirements and dimensions, than for steel wire. That not only reduces energy consumption but also makes it possible to use smaller ships or rigs for the same job.
But handling fibre rope presents a whole new class of technological challenges. Fibre rope stretches by one to three per cent under load. With the traditional traction winch, slippage between the rope and drums generates heat and abrasion, which wears down the rope causing premature failure. ODIM’s patented Cable Traction Control Unit (ODIM CTCU) has proved its ability to overcome these problems using individually controlled sheaves which move at different speeds, distributing the load evenly to prevent spinning and slippage. |
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发表于 2011-3-28 13:29
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