基于PLC—液压控制井下封隔装置的研发

发布时间：2019-05-07 03:00

【摘要】：老油田的油井很多都进入了开采的中后期阶段,产能常常出现过低的情况。这是因为经过常年的开采,井下的储油层压力减小,含水量增加的缘故。油田为了保证产量,需要采用洗井、酸化、压裂等井下增产措施。对于那些储油量过少、采油工况过于恶劣,无法开采的油井需要采用暂时封井的措施。而上述各种措施的顺利完成,都离不开井下封隔器,因此井下封隔器的研究有着重要的意义。本文设计一种井下液压封隔装置可以应用于封井、堵底水、井下止压等井下作业的过程中,可以很大程度上减少劳动强度以及提高工作效率。井下液压封隔装置的设计,首先参照了封隔器和数字液压缸的设计理论原则,在这些理论的基础上进行设计。其次根据计算中得到的坐封载荷以及井下液压封隔装置的参数,然后选定合适的材料,利用仿真软件对胶筒、液压缸活塞、中心管等重要零部件以及整体装置进行精确的静力分析,得到相应的应力云图,进而得到最大应力、安全系数等数值等。装置中引用PLC—液压控制系统,完成了流程图的制作、编写梯形图及软件测试的工作,使井下封隔器实现了电气化控制。本文将数字液压缸与封隔器进行了有机的结合,设计出了一种井下液压封隔装置,减少劳动强度,同时保证操作时的安全性。
[Abstract]:Many of the oil wells in the old oil fields have entered the middle and late stages of production, and the production capacity is often too low. This is due to the reduction of downhole reservoir pressure and the increase of water content after year-round production. In order to ensure production, downhole stimulation measures such as washing well, acidizing, fracturing and so on are needed. For those wells that have too little oil storage and poor production conditions, temporary sealing measures should be adopted for those wells that cannot be produced. Therefore, the study of downhole Packer is of great significance. In this paper, a kind of downhole hydraulic sealing device is designed, which can be used in downhole operation such as well sealing, bottom water plugging, downhole pressure stopping and so on, which can reduce labor intensity and improve working efficiency to a great extent. In the design of downhole hydraulic sealing device, the design principle of Packer and digital hydraulic cylinder is first referred to, and the design is carried out on the basis of these theories. Secondly, according to the calculation of the seated load and the parameters of the downhole hydraulic sealing device, then select the appropriate material, using the simulation software to the rubber cylinder, hydraulic cylinder piston, The accurate static analysis of the important parts such as the central tube and the integral device is carried out, and the corresponding stress cloud diagram is obtained, and then the maximum stress, safety factor and other values are obtained. The PLC- hydraulic control system is used in the device, the flow chart is made, the trapezoidal diagram and software testing are compiled, and the electrification control of downhole Packer is realized. In this paper, the digital hydraulic cylinder and Packer are combined organically, and a kind of downhole hydraulic sealing device is designed, which can reduce the labor intensity and guarantee the safety of operation at the same time.
【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】：TE931.2

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