有杆泵减载深抽技术优化设计研究

发布时间：2018-07-31 17:33

【摘要】：随着油田开发的不断深入,油田深抽开发需求加大。然而现有的小泵深抽技术难以满足当前深抽需求,而且大泵深抽又无法通过常规的有杆泵举升来实现。减载深抽技术的出现,一定程度上地解决了深抽难题,但减载深抽井杆柱受力更为复杂,如何进行深抽杆柱设计及减载深抽参数优选来满足深抽需求的问题亟待解决。针对目前减载深抽过程中出现的问题,基于减载器结构原理的研究,建立出减载力的计算模型,研究加装减载器的深抽油井井筒流体的运动规律,确定其对杆柱受力的影响;分别建立出加装减载器及使用减载深抽泵的抽油杆柱力学模型,以及悬点载荷计算模型;确立了减载深抽井杆柱设计方法;在此基础上,编制“有杆泵减载深抽技术优化设计软件”,能够针对不同减载深抽技术和不同深抽需求,对有杆泵减载深抽系统进行优化设计,为减载深抽井优化设计提供依据。通过示例井的设计分析,结果表明:不同型号的减载器均存在一个安全的下入深度;减载器及减载深抽泵均可实现减载深抽效果,且极限下泵深度与大、小柱塞组合的面积差有关。针对现场使用过程中出现的减载深抽井杆柱疲劳寿命变短的现象,利用有限元软件ABAQUS及疲劳寿命软件fe-safe进行验证分析,给出减载器使用过程中的下入深度要求,即在达到深抽要求的前提下,尽量降低减载器的下入深度,避免在杆柱中间位置安装减载器,改善杆柱应力状态,延长杆柱使用寿命。
[Abstract]:With the development of oil field, the demand for deep pumping is increasing. However, the existing deep pumping technology of small pump is difficult to meet the demand of current deep pumping, and the deep pumping of large pump can not be realized by conventional rod pump lift. The emergence of the technology of reducing load and deep pumping solves the problem of deep pumping to a certain extent, but the force of rod string is more complicated, so how to design the deep pumping rod and how to select the optimum parameters to meet the demand of deep pumping should be solved urgently. In view of the existing problems in the process of deep pumping, based on the research of the structure principle of the reducer, the calculation model of the load reducing force is established, and the movement law of the fluid in the deep pumping well with the load reducer is studied, and the influence of the load reducer on the stress on the rod string is determined. The mechanical model of sucker rod string and the calculation model of suspension load are established respectively, and the design method of rod string is established. The software of optimization design of rod pump load reduction and deep pumping technology is compiled, which can optimize the design of rod pump load reducing deep pumping system according to different load reducing deep pumping technology and different deep pumping demand, which provides the basis for the optimum design of load reducing deep pumping well. Through the design and analysis of the sample well, the results show that there is a safe entry depth for different types of reducers, both the load reducer and the load reducing deep pumping pump can achieve the effect of reducing load and deep pumping, and the depth of the pump under the limit is large. The area difference of the small plunger combination is related. In view of the phenomenon that the fatigue life of the download-reducing deep pumping rod string becomes shorter during the field operation, this paper uses the finite element software ABAQUS and the fatigue life software fe-safe to verify and analyze, and gives the requirements of the lower entry depth of the load reducer in the process of using the load reducer. On the premise of reaching the requirement of deep pumping, the depth of load reducer is reduced as far as possible, and the load reducer is not installed in the middle of the rod column, which improves the stress state of the rod column and prolongs the service life of the rod column.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE355.5

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