东海海域拖轮拖带自升式钻井平台适应性分析

Adaptability Analysis of Tug Towing the Jack-up Rig in East China Sea Area

何福耀 左宏刚 施览玲 黄召

HE Fuyao ZUO Honggang SHI Lanling HUANG Zhao

中海石油(中国) 有限公司上海分公司, 上海 200335

China Limited-Shanghai Company, CNOOC, Shanghai 200030, China

受天气、海况及被拖平台的结构影响，拖航作业对拖轮的拖带能力要求很高。在东海海域某次H拖轮主拖K自升式平台由井位1至井位2的过程中，出现了拖航速度达不到预计航速的情况；此次拖航过程中还出现了平台甲板上浪严重、平台稳性不好等问题。此文重点对K平台在不同海况下的拖航阻力进行了计算，并结合H拖轮的拖带能力，得出了不同海况下，H拖轮主拖K平台由井位2至井位3过程中的最大航速，经对比结果与实际拖航航速也较吻合。通过模拟拖航可变载荷，在平台稳性满足操船手册要求的前提下，估算了K平台拖航时的最大收桩高度，为拖航作业的安全高效进行提供了理论依据。

Affected by the weather, sea conditions and the structure of jack-up rig towed, the towing ability of tug is highly demanded in the towing operation. In the course of tug H towing jack-up rig K from well location 1 to location 2, the towing speed did not reach the expected speed, accompanied with the severe green water on deck and the stability of the rig being not good. Based on the calculation of the towing resistance of rig K under different sea conditions, together with the analysis of towing ability, the authors suggested the maximum speed of tug H when towing the rig K from well location 2 to location 3. This calculated result was consistent with the actual. By simulating the variable load, the authors also estimated the maximum uprising height of the leg when towing rig K on the premise of meeting the requirements of operation manual for the rig stability, which provides a theoretical foundation for the safe and high efficient towing operation.

https://doi.org/10.3969/j.issn.1008-2336.2018.03.081