J型铺设系统施工工艺研究

J型铺设法被认为是最适用于深水和超深水管线铺设的方法。文中针对16 000 t深水半潜式起重铺管平台所采用的铺管形式及J型铺设系统的结构布置特点,将J型铺设工艺分为管线初始铺设、正常J型铺设周期和管线终止铺设三个部分。管线初始铺设包括初始准备、管线初始端PLET的安装及连接PLET与起始桩;正常铺设周期是指在平台甲板上进行管线装载开始直至管线从J型塔下放入水的一系列工艺流程;管线终止铺设包括收弃管作业过程。系统研究各部分的工艺流程,提出了适合目标平台所配备的J型铺设系统的铺管程序,为今后J型铺设系统的研究及实际铺设工程作业提供参考。

Research on construction technology of J-lay system

J-lay method is the most suitable method for the deepwater and ultra-deepwater pipe laying. The pipe laying form and the structure arrangement characteristics of J-lay system are investigated for a 16 000 t deepwater semi-submersible lifting and pipe laying platform. Then the J-lay technology can be divided into three parts:pipeline initiation, normal J-lay cycle, and pipeline termination. The pipeline initiation includes initial preparation, installation of pipe initiating end PLET and the connection between PLET with start-up pile. And the normal J-lay cycle refers to the technology process starting from the load of pipelines on the platform deck to pipeline initiation;normal J-lay cycle refers to the technology process starting from the load of pipelines on the platform deck to pipe laid down into water through J-lay tower; pipeline termination includes the process of pipe abandonment and recovery. This paper systematically researches the technological process of each part, puts forward the pipe laying program ift for the J-lay system in the target platform, and provides reference for the future research on J-lay system and practical J-lay engineering.