一种多功能局部反循环工作筒
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摘要
随着油田进入中后期开发,地质情况开始不断恶化,油水井普遍存在井筒漏失的现象,为井下作业带来诸多难点。同时,随着钻采工艺的不断发展进步,油田多部署大斜度井、水平井,使得后期大修作业,尤其是套、磨铣等循环作业存在很大的风险。现所论述的多功能局部反循环工作筒可克服上述系列施工难点及风险,不仅提高套磨铣效率,缩短生产周期,而且可通过更换辅件,实现工具的多功能用途。该工具的应用对于提高时效,促进大修技术进步具有积极意义。
With the oilfield entering the middle and later development period,geologic condition begins deteriorating,and the leakage phenomenon of wellbore for oil and water wells is widespread,which brings many difficulties for the down-hole work.At the same time,with the continuous development of drilling technology progress,high angle wells and horizontal wells are deployed in oilfield,making the later workover operation,especially the circulation work such as washover or milling,has a big risk.The multifunctional parted reverse circulation working barrel discussed at present can overcome the above series of construction difficulties and risks,not only improving the efficiency of sets of milling,shortening the production cycle,but also implementing multi-function purpose of the tools by changing the accessaries.The application of has positive significance for the improvement of efficiency,promoting overhaul technology progress.
With the oilfield entering the middle and later development period,geologic condition begins deteriorating,and the leakage phenomenon of wellbore for oil and water wells is widespread,which brings many difficulties for the down-hole work.At the same time,with the continuous development of drilling technology progress,high angle wells and horizontal wells are deployed in oilfield,making the later workover operation,especially the circulation work such as washover or milling,has a big risk.The multifunctional parted reverse circulation working barrel discussed at present can overcome the above series of construction difficulties and risks,not only improving the efficiency of sets of milling,shortening the production cycle,but also implementing multi-function purpose of the tools by changing the accessaries.The application of has positive significance for the improvement of efficiency,promoting overhaul technology progress.
引文
[1]梁瑞,李乐.油管与套管抗内压强度研究[J].断块油气田,2012,19(3):378-381.
[2]API 5C3-1994套管、油管、钻杆和管线管性能计算公式公报(中文版):3-19.
[2]API 5C3-1994套管、油管、钻杆和管线管性能计算公式公报(中文版):3-19.