【摘 要】
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It was originally planned that the Liuhua 11-1 Tension Leg Platform(TLP) would be constructed by China Offshore Oil Engineering Co.,Ltd.at its dock in Qingdao.After the closure of upper blocks and the completed construction of a lowerfloating body,it woul
【机 构】
：
Offshore Oil Engineering Co., Ltd.
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It was originally planned that the Liuhua 11-1 Tension Leg Platform(TLP) would be constructed by China Offshore Oil Engineering Co.,Ltd.at its dock in Qingdao.After the closure of upper blocks and the completed construction of a lowerfloating body,it would then be towed out of the dock and set for sail via wet towing.However,due to the insufficient depths of the dock in Qingdao and the fairway,additional temporary buoyancy is required for the safe undocking and sailing of the TLP.In this paper,a technique to provide additional buoyancy by use of temporary ballast tanks positioned on both sides outside the Pontoon of the TLP to reduce its draft was studied.The paper also introduced the design,mounting and offshore removal of the temporary ballast tanks and additional related techniques,which will provide reference for subsequent integral undocking projects relating to floating platforms that require additional temporary buoyancy.
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