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Edition and Publication:
< Natural Gas and Oil > Editorial Department
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China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
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Issue:ISSN 1006-5539
          CN 51-1183/TE

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    Discussion on Directional Drilling River Crossing Design and Construction in Sichuan Region
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    Key Words：Sichuan region;Directional drilling crossing;Design;Construction
    Abstract：In 2007,natural gas pipeline network construction in Sichuan region came into a stage of rapid development.PetroChina Southwest Oil and Gas Field Company started successively ChengduDeyang Gas Pipeline Project,North Inner Ring Gas Gathering and Transportation Pipeline Project,South Trunk Western Doublepipeline Project and Potential Safety Hazard Rectification Project in South Trunk Eastern Section.In these gas pipeline projects,directional drilling crossing method was selected for a number of gas pipelines crossing large and medium rivers.Summarized are a series of issues occurring in directional drilling crossing design and construction,such as site access construction,pebble bed treatment,grout oozing out treatment,corrosion layer protection,dragbackward site treatment and survey method.Examples are taken to analyze causes of the issues and possible effects,corresponding preventive measures are proposed,which are helpful to future directional drilling river crossing design and construction in this region.
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