Key Problem and Technical Research of Optic-Fiber Cable Buried in Same Trench with Oil (Gas) Pipeline Project

Abstract

The optic-fiber transmission system can supply large-capacity and high-reliability channels for SCADA data, voice, security, and office automation of oil (gas) pipelines. The same trench-buried method is widely used in the optic-fiber cable installation of the pipeline project since it has many advantages, such as, reducing the earthwork, saving land, and using the ipeline facility to protect the cable. To direct and regulate the same trench-buried project after a long period of practice in many projects, we formed a set of standard system and basic work. An example is the petroleum industry code: SY/T 4108 design and construction code of optical fiber cable (high-density polyethene silicore duct) laying in the same trench with oil (gas) pipeline, which was first published in 2005 and updated in 2012. However, the same trench-buried method still has some key problems on engineering and construction aspects, such as: the selection principle of laying method (direct bury or blow in silicon duct) has not established a theory system; pipeline construction makes negative influence on optic-fiber cable installation quality. At first, this paper will be considering comprehensively with the terrain & landform factor, local develop level, crossing frequency and the steps and method of pipeline installation to give out a conclusion about laying method with high utility and systematicness. Furthermore, the paper will illustrate the reason of discontinuous construction of oil (gas) pipeline and the damage which was made during pipeline construction process, and to proposed the guiding principles and optimization suggestions to improve the quality and service life of optic-fiber cable in same-trench buried oil (gas) pipeline project.