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首页> 外文会议>Biennial International Pipeline Conference(IPC 2004) vol.3; 20041004-08; Calgary(CA) >INNOVATIVE APPROACH FOR A PIPELINE PRE-OPERATION
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INNOVATIVE APPROACH FOR A PIPELINE PRE-OPERATION

机译：管道预运行的创新方法

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"Oleoduto Cabiunas REDUC - OSDUC II", a new 183km 10in pipeline, started operating for TRANSPETRO, a subsidiary of PETROBRAS, in September 2002, transporting Natural Gas Liquids from Cabiunas Terminal, the on-shore facility responsible for treating all natural gas coming from Campos basin crude oil production fields, to a NGL Fractionation Plant (UFL) inside Duque de Caxias PETROBRAS refinery (REDUC), near Rio de Janeiro. Because the NGL delivered from natural gas treatment process was absolutely free of water and considering the high sulfur content in the wet gas coming to shore, the pipeline was designed to be dried with nitrogen, after construction and hydrostatic tests, regardless of pipe materials specifications, in order to prevent corrosion and hydrogen-induced cracking. Commissioning, the next step, could not be performed as a simple and single operation, because the Liquids Recovery Plant (URL), in the first of three development phases, did not have the capacity either to feed main pipeline pump with the minimum flow required to maintain continuous operation or to assure pig run to be performed within the ideal speed range to guarantee good sealing efficiency. After none of the few available alternatives proved to be suitable, there was no doubt that an innovative approach was the only way to overcome the challenges on commissioning the line under such sort of restrictions despite running risks of postponing pipeline startup in case the filling process did not succeed accordingly. Then, TRANSPETRO engineering team came up with an unusual solution where the line fill process was divided into 8 pumping-stoppage cycles along with the use of polyurethane pigs as a mechanical barrier between liquid and gas phases. This work describes all key factors from pipeline conceptual design, to commissioning procedures and implementation, as well as the tools used to forecast flow conditions and all critical events.
机译：一条全长183公里的10英寸新管道“ Oleoduto Cabiunas REDUC-OSDUC II”于2002年9月开始为PETROBRAS的子公司TRANSPETRO运营，从陆上设施Cabiunas Terminal运送天然气液体，该码头负责处理所有天然气。坎波斯盆地的原油生产场，到里约热内卢附近的杜克·德·卡夏斯·彼得罗布拉斯炼油厂（REDUC）内的NGL分馏厂（UFL）。由于天然气处理过程中输送的NGL绝对不含水，并且考虑到流入岸上的湿气中硫含量很高，因此无论管道材料的规格如何，在构造和静水压试验之后，该管道的设计均应使用氮气进行干燥，为了防止腐蚀和氢致开裂。由于在三个开发阶段的第一阶段中，液体回收站（URL）既没有能力以所需的最小流量向主管道泵供料，也不能将调试作为下一步的简单且单一的操作来执行。保持连续运行或确保清管器运行在理想的速度范围内，以确保良好的密封效率。在少数可用的替代方法都不被证明是合适的之后，毫无疑问，创新的方法是克服这种限制下调试生产线的唯一方法，尽管在灌装过程中存在延缓管道启动的风险不能相应地成功。然后，TRANSPETRO工程团队提出了一个非同寻常的解决方案，将生产线填充过程分为8个泵送停止循环，并使用聚氨酯清管器作为液相和气相之间的机械屏障。这项工作描述了从管道概念设计到调试程序和实施的所有关键因素，以及用于预测流量条件和所有关键事件的工具。

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