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长输管线是天然气生产中必不可少的一个环节。随着我厂南四干线的建成投产,长输管线在长庆气田起到了越来越重要的作用,但是长输管线一般都具有管径大、容积大、输差大、距离长等特点,在生产运行过程中容易出现液固体杂质聚积使输差增大,局部腐蚀及意外机械损伤等情况,给安全平稳供气、环境保护和人民生命财产安全都带来了极大的隐患。所以对长输管线的生产技术管理就日益显得重要。本文以长庆气田南四干线为实例,从长输管线的置换、强度试压、清管等方面,对长输管线生产工艺进行了优选,提出了意见及建议。
Long-distance pipeline is an essential part of natural gas production. With the completion of the South Fourth Route of our plant, the long-distance pipeline has played an increasingly important role in Changqing Gas Field. However, the long-distance pipeline generally has the characteristics of large diameter, large volume, large output difference and long distance, In the course of production and operation, liquid-solid impurities tend to accumulate to increase the transmission difference, local corrosion and accidental mechanical damage, which bring great hidden danger to safe and stable gas supply, environmental protection and people’s life and property safety. Therefore, the long-distance pipeline production technology management is increasingly important. Taking the South Fourth Route of Changqing Gas Field as an example, this paper optimizes the production technology of long distance pipeline from aspects of long distance pipeline replacement, strength test and pigging, and puts forward opinions and suggestions.