承扭式连续管开窗钻具组合力学特性研究

房军; 韩晓菲; 曾静; 高德利

doi:10.11911/syztjs.201702008

承扭式连续管开窗钻具组合力学特性研究

1.
石油工程教育部重点实验室(中国石油大学(北京)), 北京 102249;
2.
中石化胜利石油工程有限公司钻井工程技术公司, 山东东营 257064

基金项目:

国家自然科学"井下钻井液往复控制连续波信号的产生特性研究"（编号：51474230）及国家自然科学基金创新研究群体项目"复杂油气井钻井与完井基础研究"（编号：51521063）联合资助。

详细信息

作者简介:
房军(1959—),男,山东德州人,1985年毕业于山东广播电视大学机械设计专业,2004年获中国石油勘探开发研究院油气井工程专业博士学位,副教授,硕士生导师,主要从事油气井力学与控制工程研究。

中图分类号: TE921⁺.2
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出版历程
- 收稿日期: 2016-09-26
- 修回日期: 2017-02-26
- 刊出日期: 2017-05-10

Mechanical Properties of Torsion-Resistant Milling BHA for CT Sidetracking

1.
MOE Key Laboratory of Petroleum Engineering, China University of Petroleum(Beijing), Beijing, 102249, China;
2.
Drilling Engineering and Technology Company, Sinopec Shengli Oilfield Service Corporation, Dongying, Shandong, 257064, China

摘要

摘要: 针对目前连续管侧钻开窗工艺存在的动力钻具容易反转、切削动力不足等主要问题，提出了一种承扭式连续管开窗钻具组合，并介绍了其工作原理，建立了纵横弯曲力学模型，进行了侧钻窗口形状设计和铣鞋力学特性分析，讨论了钻压、动力钻具长度、柔性短节长度和抗弯刚度等参数对磨铣过程中侧向力、转角的影响。计算结果表明：侧向力随铣鞋偏心位移增加呈线性增大，在骑套段侧向力和转角不发生变化；侧向力随钻压升高由降斜力变为增斜力，随动力钻具长度增加先减小后增大，随柔性短节长度增加由增斜力变为降斜力，随柔性短节抗弯刚度增加而减小；铣鞋转角受钻具组合参数的影响小。研究结果表明：通过改变钻压、钻具组合尺寸参数可以调节开窗钻具组合的力学性能，控制磨铣过程中铣鞋的侧向力，这对现场钻井作业具有一定的指导意义。
- 开窗侧钻 /
- 连续管侧钻 /
- 斜向器 /
- 钻具组合 /
- 力学分析
Abstract: Currently, CT sidetracking processes frequently suffer from reverse rotation of power tools, insufficiency in cutting powers and other key issues. Accordingly, it was proposed to mill BHA for windowing of CT sidetracking operations. In addition to highlighting the working principles of the BHA, mechanical models for vertical and vertical deformations have been constructed. Configurations of sidetracking windows have been designed and mechanical properties of milling shoes have been analyzed. Furthermore, impacts of drilling pressures, lengths of power tools, lengths and rigidity of flexible nipples and other factors on mechanical behaviors have been reviewed. Calculation results showed that lateral forces might linearly increase with increases in the eccentric displacement of milling, while no change could be observed in lateral force and rotation angle during milling along the vertical line of the deflecting surface. Lateral force increased from drop tendency to buildup tendency with increases in WOBs, whereas lateral forces decreased to minimum and then increased with increases in lengths of downhole motors. At the same time, lateral force decreased from buildup tendency to drop tendency with increase of length of flexible nipples. Lateral force increased with the decrease of bending rigidity of flexible nipples. The variations had no major impact on rotation angles. Research results showed mechanical properties of milling BHA deployed for sidetracking operations could be effectively regulated by adjusting drilling pressures, sizes of milling BHA and other parameters. In this way, rhw lateral forces of milling could be managed efficiently. Relevant research conclusions may provide necessary guidance for drilling operations on site.
- casing exit /
- CT sidetracking /
- whipstock /
- milling BHA /
- mechanical analysis

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参考文献(15)

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