特殊工况下连续油管作业机注入头失效分析与研究

发布时间：2018-01-07 04:45

本文关键词：特殊工况下连续油管作业机注入头失效分析与研究　出处：《大连交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：连续油管作业机凭借其作业成本低、操作便捷、作业效率高等优点被广泛应用于油气田作业。注入头是连续油管作业机的核心部件,其性能优劣直接决定整机的工作性能。当连续油管作业机在特殊工况工作,对注入头的性能要求更高,如果注入头性能达不到特殊工况要求,将会造成不可估量的经济损失,甚至会危及生命。因此对连续油管注入头进行特殊工况失效研究具有重要的理论指导意义和经济价值。对连续油管作业机作业的特殊工况和注入头的失效形式进行了初步分析。首先,对连续油管作业机的基本组成及注入头的基本结构进行了分析;然后,对连续油管作业机作业的特殊工况进行了分析,得出了连续油管作业机作业的特殊工况有多种;最后,对注入头可能出现的失效进行初步分析,得出应重点分析井喷相关工况下链条失效、卡钻工况下管块夹持系统失效及井筒堵塞工况下井口无支撑段油管压曲失效。对井喷相关工况下注入头链条进行了失效分析。对链板和滚子进行了疲劳失效分析,得出了链条起出油管的极限提升速度;对链条中的销轴进行了强度校核,验证了销轴是否满足强度要求;对链轮与滚子的接触进行了有限元分析,找出了链轮失效的原因。对卡钻工况下注入头管块夹持系统进行了失效研究。理论计算了卡钻工况下注入头的临界提升力和临界夹紧力;对偏载夹持失效与错位夹持失效进行了有限元分析,得出了两种夹持方法对油管的夹持损伤程度;提出了提高管块夹持性能的方法,并对其进行了分析与研究。对井筒堵塞工况下井口无支撑段油管进行了压曲分析。对比分析了连续油管的特征值压曲与非线性压曲,得出了两种分析下油管压曲临界载荷;研究了影响油管压曲的因素并分析了各因素对油管压曲临界载荷的影响。
[Abstract]:Continuous tubing machine is widely used in oil and gas field operation by virtue of its low operating cost, convenient operation and high working efficiency. Injection head is the core component of continuous tubing machine. Its performance directly determines the performance of the whole machine. When the continuous tubing machine works under special conditions, the performance of the injection head is higher, if the performance of the injector does not reach the special working conditions. Will cause incalculable economic losses. Therefore, it is of great theoretical significance and economic value to study the failure of continuous tubing injector under special working conditions. It's a preliminary analysis. First of all. The basic composition of the continuous tubing machine and the basic structure of the injection head are analyzed. Then, the special working conditions of coiled tubing machine are analyzed, and it is concluded that there are many kinds of special working conditions of coiled tubing machine. Finally, the possible failure of injection head is analyzed preliminarily, and the chain failure under blowout related condition should be analyzed emphatically. Failure of pipe block clamping system under drilling condition and tubing buckling failure of unsupported section of wellhead under wellbore clogging condition. Failure analysis of injection head chain under blowout related condition, fatigue failure analysis of chain plate and roller are carried out. . The limit lifting speed of the chain tubing is obtained. The strength of the pin shaft in the chain is checked to verify whether the pin shaft meets the strength requirement. The contact between sprocket and roller is analyzed by finite element method. The causes of the failure of the sprocket are found out. The failure of the clamping system of the injection head is studied. The critical lifting force and the critical clamping force of the injection head are calculated theoretically. The finite element analysis of offset clamping failure and staggered clamping failure is carried out, and the degree of clamping damage to tubing by two kinds of clamping methods is obtained. A method to improve the clamping performance of pipe blocks is proposed. It is analyzed and studied. Under the condition of wellbore plugging, the tubing in the unsupported section of wellhead is analyzed. The characteristic value and nonlinear buckling of continuous tubing are compared and analyzed. The critical load of tubing buckling under two kinds of analysis is obtained. The factors affecting the tubing buckling are studied and the influence of each factor on the critical load of tubing buckling is analyzed.
【学位授予单位】：大连交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE93

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