摘要
连续油管钻井技术已经广泛应用到油井的各作业中,由于连续油管平时缠绕在滚筒上,塑性变形很大,虽然经过注入头的矫直,仍然会有较大的残余弯曲变形,会严重影响水平井延伸长度。本文通过相似实验得到管柱不同曲径比下所受到的摩擦力曲线拟合函数,然后再通过相似分析验证模型实验的正确性并得到各相似常数,进而求得连续油管与管壁之间的摩擦阻力。经实验数据分析得出5.08 cm(2 in)的连续油管在经过多次弯曲变形后在水平井段所受到的阻力是理想未发生变形的2.3倍。由此可以按摩擦系数的两倍来估算管柱所受到的实际延伸摩阻。
The coiled tubing(CT)drilling technology is extensively employed in various operations of oil wells.The residual deformation of the CT caused by the winding on the reel has a magniˉcent effect on its extension length in horizontal wells.The friction curveˉtting functions for various ratios of the diameter of the pipe to that of the tube and the residual deformation curve are obtained through similar experiments.The similarity of the model experiment and the actual coiled tubing operation is analyzed and the similarity constants are obtained,and then the friction between the coiled tubing and the casing wall is calculated.Theˉnal results show that the friction of a 2-inch CT with a residual deformation in the horizontal well is about 2.3 times of that of the CT without the residual deformation.
作者
周志宏
吕涨
殷卓成
郑广
余礼
彭雄文
ZHOU Zhihong;Lv Zhang;YIN Zhuocheng;ZHENG Guang;YU Li;PENG Xiongwen(School of Mechanical Engineering,Yangtze University,Jingzhou 424023,Hubei,China)
出处
《力学与实践》
北大核心
2018年第3期289-293,共5页
Mechanics in Engineering
关键词
连续油管
摩阻
残余变形
水平井
coiled tubing
friction
residual deformation
horizontal well
