大宇弃置井244.5 mm套管切割打捞作业实践与认识

Practice and Understanding of 244.5 mm Casing Cutting and Fishing Operation in Daewoo Abandoned Well

孔得臣

KONG Dechen

中石化海洋石油工程有限公司上海钻井分公司，上海　201208

SINOPEC Offshore Oilfield Services Company Shanghai Drilling Division, Shanghai, 201208

2018年，勘探四号半潜式钻井平台圆满完成韩国大宇弃置项目。在ϕ244.5 mm套管切割回收作业中，采用了新的ϕ244.5 mm套管切割回收工艺，将切割和打捞两项作业结合，仅使用一趟钻具组合就完成套管的切割和回收作业，减少了组合BHA和起下钻次数，简化了作业流程，大大提高了作业的效率和可靠性。

In 2018, KAN TAN IV semi-submersible drilling platform successfully completed the DAEWOO abandoned well in South Korea. In ϕ244.5 mm casing cutting and fishing operation, the cutting and fishing operations were combined in the abandonment program, and the casing cutting and fishing was completed with a single run of string, which reduced the make-up BHA and trips. This simplified the operation process, and improved the operation efficiency and reliability.

https://doi.org/10.3969/j.issn.1008-2336.2021.03.072