水平定向钻孔-管直径比研究  

Study on Borehole-Pipeline Diameter Ratio in Horizontal Directional Drilling

作　　者：陈瑞[1] 艾志久[1] 张宏伟[2] 刘旭[1] 喻久港[1] 龙江[1] 李华宇[1] 

机构地区：[1]西南石油大学 [2]大港油田石油工程研究院

出　　处：《石油机械》2014年第10期107-110,116,共5页China Petroleum Machinery

基　　金：中石油管道建设课题"特殊地区管道建设关键技术研究"(2011B-3303)

摘　　要：在水平定向钻孔管道穿越施工时，需要适当增大扩孔直径来减小管道所受约束，这就要求确定合理的孔-管直径比。选取钻孔出土弯曲段作为研究对象，利用有限元仿真计算不同孔-管直径比条件下的管道应力分布以及回拖力变化，分析孔-管直径比最优选择。计算结果表明，孔-管直径比大于1．4时，管道最大应力值明显下降；孔-管直径比超过1．5时，管道最大应力趋于平稳。回拖载荷随孔-管直径比的增大而减小，且在孔-管直径比达到1．4后降幅逐渐减小，此时孔-管直径比对回拖载荷的影响减弱。综合考虑，孔-管直径比在1．4～1．5之间为最优。Borehole reaming is often required to reduce the pipeline constraints when running pipeline through horizontal direetional borehole. Therefore, a reasonable borehole-pipeline diameter ratio needs to be deter- mined. Taking the unearthed curved section as the research object, the pipeline stress distribution and pullback force under different borehole-pipeline diameter ratio are calculated using the finite element simulation. The opti- mized borehole-pipeline diameter ratio is also analyzed. The calculation results show that, the pipeline maximum stress decreases significantly when the borehole-pipeline diameter ratio is greater than 1.4, and will become steady when the ratio exceed 1.5. The pullback load decreases with the increase of borehole-pipeline diameter ratio and the decreasing amplitude gradually decline as the ratio reaches 1.4. Meanwhile, the effect of borehole-pipeline diameter ratio on the pullback load weakened. As a result of overall consideration, 1.4 to 1.5 are the optimized borehole- pipeline diameter ratio.

关 键 词：水平定向钻 管道穿越 孔一管直径比 应力分布 回拖力 有限元分析 

分 类 号：TE973.4[石油与天然气工程—石油机械设备]