深水急紊流区水上钻探关键技术研究与应用

Research and application of key technologies for overwater drilling in deep turbulent zones

摘要:

水上钻探由于受水深、离岸距、风浪、潮汐等自然条件影响，具有施工难度大、危险系数高、钻探效率低等难点。本文结合某水电站水上勘探工程实例，针对深水急紊流区水上钻探全过程工艺技术展开了研究及总结，对钻探平台舾装规格参数进行了理论分析与计算，完成了适用于急紊流区水上钻探平台的设计、验算及搭建工作，并提出了适用于高流速环境的护孔套管装置及收放工艺，解决了深水高流速条件下套管抗水流冲击能力弱和连接效率低等难题，保证了该地区急紊流水上钻探项目安全顺利实施。研究成果可为不同行业和地区水上钻探提供参考。

Abstract:

Due to the influence of natural conditions such as water depth， offshore distance， wind and waves， overwater drilling has difficulties such as high construction difficulty， high risk factor， and low drilling efficiency. This paper combined the overwater exploration project of a hydropower station to conduct research and summary on the entire process drilling technology in deep and turbulent water areas， including the theoretical calculation of drilling platform outfitting specification parameters， also with the platform design， verification， and construction work suitable for overwater drilling in turbulent areas， and proposed a protective casing device and retraction process suitable for high flow velocity environments， which solved the problems of poor water flow impact resistance and low connection efficiency of casing under high flow velocity conditions in deep water. The above technologies ensure the safe and smooth implementation of drilling projects on turbulent water in the region， and the research results can provide a reference for overwater drilling in various industries or regions.