连续管注入头夹持块力学研究

发布时间：2018-01-24 14:35

本文关键词： 连续管摩擦系数夹持系统塑性变形结构优化　出处：《长江大学》2017年硕士论文　论文类型：学位论文

【摘要】：目前,连续管作业技术已经被广泛的应用于油田工程中的各个领域。注入头作为连续管作业机最关键组成之一,其控制着连续管起升、下入作业以及控制钻压等行为,其性能日益被研究学者们所重视。夹持块是与连续油管直接接触的重要部件,众多研究学者们已经对夹持块的夹持情况以及其不同的结构形式等进行了比较深入的研究及探讨,并对于夹持块产品的相关设计有一定的指导意义。但是,由于连续管作业时,井下状况的复杂性,近年来在现场连续油管注入头作业过程中,经常会出现连续管的失效、夹持块的磨损,甚至于作业过程中作业事故等突发情况比较多,比如连续油管变形、注入头打滑、滚筒失控等问题导致了连续管挤毁、爆裂等失效情况,严重影响了连续油管作业机作业时的施工质量。因此,本文主要对连续管注入头夹持块进行了结构性能研究以及参数优选,以及对连续管与夹持块进行了接触有限元分析,为提高连续油管作业机的作业效率,并增大其使用寿命,对连续管安全作业具有一定的指导意义,并为夹持系统设计提供科学依据。对连续管夹持系统的研究开展了以下几方面的工作如下:(1)简要地介绍了连续油管注入头的基本组成和工作原理,对连续油管夹持部分进行了受力分析,主要包括均布外压力作用下连续油管的受力计算、夹持作用下连续管的力学分析,得到相应的理论基础。(2)对连续油管和夹持块进行了弹塑性分析,建立了连续管与夹持块的模型,在不同的轴向力和夹紧力工况下,得出了摩擦系数对连续管等效应力、等效塑性变形及连续管变形量影响情况,并通过实验研究得出连续油管与夹持块的摩擦系数范围。(3)通过ABAQUS有限元软件,对夹持块主要参数的进行分析,并从夹持块相关参数如半间距、两对夹持块之间的距离、接触面的圆槽个数和布置以及夹持块内径等方面,对夹持块进行了有限元分析与参数优选,得出了夹持块最佳结构参数优选。以上研究为提高连续油管安全作业具有一定的指导意义,并为夹持系统设计提供科学依据。
[Abstract]:At present, continuous pipe operation technology has been widely used in various fields of oil field engineering. As one of the most important components of continuous pipe operation machine, injection head controls continuous pipe hoisting. The performance of down-entry operation and control of drilling pressure has been paid more and more attention by researchers. Clamping block is an important component in direct contact with continuous tubing. Many researchers have carried on the comparatively thorough research and the discussion to the clamping block's clamping situation and its different structure form, and has the certain guiding significance to the clamping block product related design. Because of the complexity of the downhole condition during the continuous pipe operation, in recent years, the failure of the continuous pipe and the wear of the clamping block often occur during the field continuous tubing injection head operation. Even in the process of operation accidents and other emergencies such as continuous tubing deformation injection head slip roller out of control and other problems resulting in continuous tube collapse burst and other failure. The construction quality of the coiled tubing machine is seriously affected. Therefore, the structure performance and parameter selection of the continuous tubing injector clamping block are studied in this paper. The contact finite element analysis of the continuous pipe and the clamping block is also carried out. In order to improve the working efficiency and increase the service life of the continuous tubing machine, it has certain guiding significance for the safe operation of the continuous pipe. And provide the scientific basis for the design of the clamping system. The following work has been carried out on the research of the continuous pipe clamping system as follows: 1) the basic composition and working principle of the continuous tubing injection head are briefly introduced. The mechanical analysis of the clamping part of the continuous tubing is carried out, including the calculation of the stress of the coiled tubing under the uniform pressure, and the mechanical analysis of the coiled tubing under the clamping action. The corresponding theoretical basis is obtained. (2) the elastic-plastic analysis of continuous tubing and clamping block is carried out, and the model of continuous tubing and clamping block is established, under different axial force and clamping force working conditions. The influence of friction coefficient on the equivalent effect force, equivalent plastic deformation and deformation of continuous tube is obtained. The friction coefficient range of continuous tubing and clamping block is obtained by experiment. (3) the main parameters of clamping block are analyzed by ABAQUS finite element software, and the relative parameters such as half distance between clamping block are analyzed. The distance between two pairs of clamping blocks, the number and arrangement of circular slots on the contact surface and the inner diameter of the clamping blocks are analyzed by finite element analysis and parameter optimization. The optimum structural parameters of the clamping block are obtained. The above research has certain guiding significance for improving the safety operation of the continuous tubing, and provides scientific basis for the design of the clamping system.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE9

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