在充分调研国外无隔水管修井作业装备的基础上，对无隔水管修井作业技术的发展历史、技术优势和作业能力作了详细介绍。对国外现有的无隔水管修井作业技术与装备进行了归纳汇总和对比分析，同时对全球无隔水管修井作业主要服务商、修井船舶和修井装备供应商之间的关系作了列表分析。最后归纳总结了无隔水管修井作业装备的发展趋势，并对国内的无隔水管修井装备研究提出了新的展望。

On the basis of the full investigation of oversea riserless intervention operation equipment， the history， the technology benefit and the operational capability of riserless intervention technology are introduced. Summary and comparative analysis are carried out for the existing riserless intervention techniques and equipment. The global riserless intervention service providers are summarized. Finally， the development trends of riserless intervention operations and equipment are concluded， and an outlook is presented for carrying out the riserless intervention study in China.