Analysis and Design of Trial Well Mooring in Deepwater of the South China Sea  

作　　者：Yongfeng Guo Shaojun Ji Changquan Tang Jiansong Li Huiquan Zhong Ong Chin Yam Ian 

机构地区：[1]China Oilfield Services Limited, Beijing 101149, China [2]Franklin Offshore Group of Companies in Singapore, Singapore 609259, Singapore

出　　处：《Journal of Marine Science and Application》2012年第2期222-227,共6页船舶与海洋工程学报（英文版）

摘　　要：Mooring systems play an important role for semi-submersible rigs that drill in deepwater.A detailed analysis was carried out on the mooring of a semi-submersible rig that conducted a trial well drilling at a deepwater location in the South China Sea in 2009.The rig was 30 years old and had a shallow platform with a designed maximum operating water depth of 457 m.Following the mooring analysis,a mooring design was given that requires upgrading of the rig’s original mooring system.The upgrade included several innovations,such as installing eight larger anchors,i.e.replacing the original anchors and inserting an additional 600 m of steel wires with the existing chains.All this was done to enhance the mooring capability of the rig in order for the rig to be held in position to conduct drilling at a water depth of 476 m.The overall duration of the drilling was 50 days and the upgraded mooring system proved to be efficient in achieving the goal of keeping the rig stationary while it was drilling the trial well in the South China Sea.This successful campaign demonstrates that an older semi-submersible rig can take on drilling in deep water after careful design and proper upgrading and modification to the original mooring system.

关 键 词：offshore anchor operation MOORING chain wire CHASER drilling engineering semi submersible South China Sea anchor handling vessel（AHV） 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TE52[自动化与计算机技术—计算机科学与技术]