海底管线干式维修技术

海底油气管道维修是海洋资源开发的重要保障,海底管道维修方法因管道自身参数与所处环境条件不同,采取的方法和手段也不同.海底管道维修技术可分为水上维修和水下维修2类,水下维修又可分为干式维修和湿式维修2种.文中对各种维修技术进行了综述与评价,重点研究了干式维修技术."水下管道干式维修系统"是国家"863"高科技项目,旨在为水下油气管道及管桩结构的干式维修提供技术手段.水下管道干式维修系统的基本设备是一套大型水下干式舱,辅助设备有开孔封堵机、专用作业机具和干式高压焊接机等.水下干式管道维修系统具有自主知识产权,其研制成功突破了国外技术和设备垄断状态.

Dry repair technology for offshore pipelines

Effective and economical servicing of offshore oil and gas pipelines is vital for the exploitation of the world's ocean resources.Service methods and instrumentation for offshore pipelines are different from those on land because of their vastly differing performance and environments.Offshore pipe repair technology can be considered in two categories: underwater repair and on-surface repair.Underwater repair is further divided into dry repair and wet repair.A variety of service technologies appropriate for offshore pipelines were introduced and discussed in this paper,particularly research on dry repair technology.Underwater pipeline dry repair systems,financed by national 863 program of China,is aimed to provide technical means for dry repair of oil and gas pipelines and piles.The primary device of the system is typically an underwater hyperbaric chamber,with other accessory devices such as a tapping and plugging machine,specialized tools,a hyperbaric welding machine,and so on.This project to improve underwater pipeline dry repair systems was successfully finished.The repair technology has been given broad patent protection and is a breakthrough in competing with overseas companies for pipeline service contracts.