水平井段管柱轴向力传递分析与工具设计

发布时间：2018-06-29 09:31

本文选题：水平井 + 管柱　；参考：《东北石油大学》2017年硕士论文

【摘要】：石油钻采过程中,大位移水平井管柱下放时需克服管柱与井壁之间的摩阻力,限制了作业管柱的入井深度及大位移水平段的延伸,现有的振动工具都能在一定程度上降低管柱摩阻力,但工程应用的理论依据尚不充分,也无法满足大位移水平井技术发展对管柱下放能力的需求。为此,本文运用数值分析方法,考虑了管柱与井壁的间隙、摩阻系数等因素建立了水平段管柱轴向力传递分析的数值模型,采用瞬态动力学分析方法进行求解,通过算例分析研究了横向、轴向、扭转振动及其组合振动对管柱轴向力传递效率的影响规律,给出了提升轴向力传递效率最显著的单独振动形式为频率1Hz和线位移幅值3mm的横向X振动或角位移幅值为p/6的扭转振动,其中横向振动最大提升率达57.5%,扭转振动最大提升率达64.5%。两种振动形式的最佳组合为轴向+扭转,最大提升效率达74%。三种振动形式的最佳组合为横向X+轴向+扭转,最大提升效率达85.5%。结合国内外振动减阻工具,设计了横向振动工具,原理是以涡轮为旋转动力,带动偏心轴产生横向振动。轴向振动工具的设计原理是依靠脉冲压力发生器提供液压动力,驱动振动短接往复运动,使工具产生轴向振动。扭转振动工具设计主要分为导流单元和扭转振动单元,原理是通过改变流道以及相应零件的配合实现工具的扭转振动。为大位移水平井作业管柱振动减阻技术的推广应用提供技术支撑。
[Abstract]:In the process of oil drilling and production, the friction resistance between the string and the shaft wall should be overcome when the string of the long reach horizontal well is lowered, which limits the depth of entry and the extension of the horizontal section of the long displacement of the working string. The existing vibration tools can reduce the friction of pipe string to a certain extent, but the theoretical basis of engineering application is not enough, and it can not meet the requirement of long reach horizontal well technology development. In this paper, the numerical model of axial force transfer analysis of horizontal pipe string is established by taking into account the gap between string and shaft wall, friction coefficient and so on, and the transient dynamic analysis method is used to solve the problem. The effects of transverse, axial, torsional and combined vibration on the axial force transfer efficiency of pipe string are studied by an example. The single vibration forms with the most remarkable axial force transfer efficiency are the transverse X vibration of the frequency 1Hz and the linear displacement amplitude 3mm or the torsional vibration with the angular displacement amplitude of p / 6. The maximum lifting rate of the transverse vibration is 57.5 and the maximum lifting rate of the torsional vibration is 64.5. The best combination of the two forms of vibration is axial torsion, the maximum lifting efficiency is 74. The best combination of the three vibration forms is transverse X axial torsion, and the maximum lifting efficiency is 85.5. Combined with the domestic and foreign vibration drag reduction tools, the transverse vibration tool is designed. The principle is to use the turbine as the rotating force to drive the eccentric shaft to produce transverse vibration. The design principle of the axial vibration tool is to provide the hydraulic power by the pulse pressure generator and to drive the vibration short connection and reciprocating motion to make the tool produce the axial vibration. The design of torsional vibration tool is mainly divided into diversion unit and torsional vibration unit. The principle is to realize the torsional vibration of the tool by changing the flow channel and corresponding parts. It provides technical support for the extension and application of vibration drag reduction technology for long-reach horizontal wells.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE92

【参考文献】