中文摘要：

为了提高深水钻井表层导管施工的安全性和时效性，针对深水浅层钻井难题，基于锤击沉桩原理，通过理论分析和工艺研究，对深水钻井表层导管水下打桩安装技术进行了分析。深水钻井表层导管水下打桩安装技术采用水下液压打桩锤系统将表层导管锤入地层，可在工作船上实施作业，不占用钻机时间。针对我国南海深水浅层地质特点和油气开发需求，对该技术在南海深水钻井表层导管施工作业的适应性进行了研究。结果表明，与目前采用的表层导管钻孔/固井和喷射法安装技术相比，水下打桩技术可分别节省65％和43％的作业时间、79％和46％的作业费用。表层导管水下打桩安装技术可有效提高深水浅层钻井的安全性和经济性，对我国南海深水钻井表层导管施工具有很好的适应性。

英文摘要：

In order to improve the safety and efficiency of deepwater drilling conductor installation op-eration ,underwater tamping technique was studied .In view of the deepwater shallow formation drilling problem and based on the pile driving method ,the underwater tamping technique for deepwater drilling conductor installation was analyzed through theoretical analysis and process research .This technique uses underwater hydraulic pile system to drive surface conductor into deepwater formation from the working ship ,without taking the rig time .According to the geological characteristic of deepwater shallow zone in South China Sea and the requirement of oil and gas exploitation ,the adaptability of the underwater tamping technique applied in South China Sea deepwater drilling operation was analyzed .Compared with the con-ductor drilling/cementing and jetting technique ,underwater tamping can save 65% and 43% of operation time ,and 79% and 46% of operation costs ,respectively .Conductor underwater tamping technique can sig-nificantly improve the safety and economics of deepwater shallow drilling operation ,is suitable for the deep-water surface conductor installation in South China Sea .