深水钻井平台三种移位方式对比分析

Comparative Analysis on Three Move Methods of Deepwater Drilling Platform

深水钻井平台移位主要有使用自身推进器自航、由拖轮拖带(纯拖)、由拖轮拖带且同时使用推进器协助(混拖)三种方式。以海洋石油981为例,就该平台的自航、纯拖及混拖三种移位工况,就三种移位方式存在的风险隐患及经济效率分别进行分析。分析结果表明,自航移位方式经济性最好,混拖次之;混拖所需移位时间最短,自航和纯拖所需时间基本相同。

Deepwater semi-submersible drilling units normally move between well locations by sailing using selfpropulsion,towing by tug boat,or combination of self-propulsion and towing.Comparison and analysis of these three approaches are carried out in the aspects of risk tolerance and economic efficiency using HYSY981 as an example.The results show that：self-propulsion is the most economical way of the three,combination towing is the second,but the combination towing could save a lot of time,and the time of moving the platform by self-propulsion and that by towing are almost the same to each other.