水缆同步回拖技术在岩石定向钻中的应用  

Backtow technique of underwater optical cable together with pipeline in horzontal directional drilling in rocky area

作　　者：安治国[1] 

机构地区：[1]中国石油天然气管道局国内事业部,河北廊坊065000

出　　处：《油气储运》2013年第2期218-222,共5页Oil & Gas Storage and Transportation

摘　　要：西气东输二线东段管道沿线地质复杂,为了解决定向钻穿越施工问题,针对西气东输二线锦江定向钻穿越现状,采用水下光缆与主管道同步回拖技术进行施工。结合工程实例,阐述了水缆的选择、光缆固定方式、定向钻成孔质量控制、应力释放与缠绕、风险预测及防范措施等,对施工中光缆的受力情况进行了分析,其设计回拖力为6.894kN,仅为主管道回拖力的1.19%。水缆同步回拖技术在该工程的成功应用,在国内尚属首次,有效缩短工期约20%,施工成本比传统穿越钢套管降低约80%。该技术可以有效应用于穿越岩石等复杂地质结构,具有较好的经济效益和社会效益以及较高的推广价值。(表1,图2,参4)The geological conditions along the eastern section of the Second West-to-East Gas Pipeline are complex. To solve the technical issues in HDD, the backtow technique of underwater optical cables together with main pipeline was adopted referring to the current crossing situation in Jinjiang HDD Project of the Second West-to-East Gas Pipeline. This paper, based on the project case, describes the selection of underwater optical cables, fixing mode of optical cables, borehole quality control of directional drilling, strain release and winding, risk prediction and prevention, etc, and analyzes the stress condition of optical cables in construction, and its designed backtow force is 6.894 kN, only 1.19% of that of the main pipeline. This technique is the first successful application in China, which effectively shortens the construction period up to 20%, and saves construction cost by 80% compared to traditional crossing with steel casing. It is considered that this technology can be effectively applied in crossing complex geological structures like rock, with good economical and social benefits and high promotion value. （1 Table, 2 Figures, 4 References）

关 键 词：水缆 同步回拖 岩石地质 定向钻穿越 

分 类 号：TE89[石油与天然气工程—油气储运工程]