Mechanical Model and Analysis for Pullback of Horizontal Well Crawler
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摘要: 面对油气开发中水平井井下作业的复杂性，一种输送工具-水平井爬行器已被大部分油田采用，并取得了较好的经济效益。根据爬行器的工作原理，首先建立单根电缆空间位置几何关系以及受力分析，然后再扩展至相连电缆的力学分析，并与爬行器回拉过程力学相结合，得到了地面电缆张力与爬行器缆头张力的表达式，最后通过与实验对比，得到理论计算结果与工程实测数据误差较小，验证了所建立的力学模型的可靠性。Abstract: For the complexity of downhole operation of horizontal wells in oil and gas development, a conveying tool-Horizontal Well creeper has been adopted in most oilfields, and has achieved good economic benefits. According to the working principle of the creeper, the geometric relationship between the spatial position of a single cable and the stress analysis are firstly established, and then the mechanical analysis of the connecting cable is extended. Combining with the mechanics of the pullback process of the creeper, the expressions of the ground cable tension and the creeper cable head tension are obtained. Finally, the expressions of the ground cable tension and the creeper cable head tension are obtained by comparing with the experimental results. The error between the calculation results and the measured is small, which verifies the reliability of the mechanical model.
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Key words:
- horizontal well crawler /
- pullback /
- mechanics model /
- cable tension
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表 1 理论与实测张力值对比
名称 极限实测值 极限计算值 误差值 误差百分比 地面电缆张力 2 861 N 2 647 N 214 N 0.075 爬行器缆头张力 1 894 N 1 735 N 159 N 0.084 
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