高造斜率旋转导向钻井工具原理与力学性能分析

发布时间：2018-02-14 06:47

本文关键词： 高造斜率旋转导向钻井原理力学分析　出处：《西安石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：旋转导向钻井技术是一项以旋转导向钻井工具为核心的尖端自动化钻井技术。当前对于非常规油气资源的开发,特别是页岩气的开发,对钻井技术的要求越来越高。常规的旋转导向钻井工具对于满足非常规油气资源开采所需要的大位移井或丛式水平井的钻探,具有造斜能力不强、作业成本高等问题。针对非常规油气资源开发所面临的挑战,设计了一种新型高造斜率旋转导向钻井工具。它除具有常规旋转导向钻井工具的起下钻次数少、机械钻速高、钻井作业效率高、井眼轨迹控制精确等的优势外,还具有造斜能力强、造斜率可控范围宽、造斜点可以较深等特征。本文通过分析推靠式旋转导向钻井工具和指向式旋转导向钻井工具的工作原理,结合两者的优点,设计了高造斜率旋转导向钻井工具的结构,分析了高造斜率旋转导向钻井工具的工作原理;利用SolidWorks三维建模软件,建立了工具的数字化样机;利用ANSYS有限元分析软件,分析了钻压传递装置和扭矩传递装置的强度;采用纵横弯曲法和三点定圆法,建立了下部钻具组合的力学模型,分析了下部钻具组合的受力与变形,推导了三弯矩方程组、钻头处侧向力和造斜率的计算公式,利用极限曲率法计算工具的理论造斜率,最大值为30/45.10m?;利用计算实例,通过对影响下部钻具组合造斜能力的因素进行分析,得到已钻井身曲率、钻头指向偏角、井斜角对下部钻具组合的造斜能力影响明显;通过分析控制轴的受力情况,完成了控制轴的动力学分析,得到了动力学方程。通过以上工作,说明了高造斜率旋转导向钻具工具的优势,以及方案的可行性,为高造斜率旋转导向钻具工具的研究与开发提供了理论依据。
[Abstract]:Rotary steering drilling is a cutting-edge automated drilling technology with rotary steering drilling tools as its core. The current development of unconventional oil and gas resources, especially shale gas, The conventional rotary steering drilling tools have not strong diagonal ability for the drilling of long displacement wells or bundles horizontal wells that meet the requirements of unconventional oil and gas resource exploitation. Aiming at the challenge of unconventional oil and gas resources exploitation, a new type of rotary steering drilling tool with high slope rate is designed. In addition to the advantages of high drilling efficiency and accurate wellbore trajectory control, it also has strong diagonal ability and wide controllable range of slope making. Based on the analysis of the working principle of the push rotary steering drilling tool and the directional rotary steering drilling tool, and combining the advantages of the two tools, the structure of the high slope producing rotary steering drilling tool is designed. The working principle of the high slope rotary steering drilling tool is analyzed, the digital prototype of the tool is established by using SolidWorks 3D modeling software, the strength of the drilling pressure transfer device and the torque transfer device is analyzed by using the ANSYS finite element analysis software. The mechanical model of the lower drilling tool combination is established by using the longitudinal and transverse bending method and the three-point fixed circle method. The stress and deformation of the lower drilling tool combination are analyzed. The equations of three bending moments, the calculation formula of lateral force and slope at the bit are derived. Using the limit curvature method to calculate the theoretical slope of the tool, the maximum value is 30% 45.10 m? Through the analysis of the factors that influence the lower drilling tool combination's diagonal ability, it is obtained that the curvature of the drill bore, the bit direction deflection angle and the well inclination angle have obvious influence on the lower drilling tool combination's diagonal ability by using the calculation example. By analyzing the stress of the control shaft, the dynamic analysis of the control shaft is completed, and the dynamic equation is obtained. Through the above work, the advantages of the high slope rotary guided drilling tool and the feasibility of the scheme are explained. It provides a theoretical basis for the research and development of high slope rotary guided drilling tools.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE921

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