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封堵球作为井下较为常用的密封工具,现阶段在设计上往往仅由设计者依靠经验完成,缺少相关的理论支持,导致其密封的效果无法得到保障。针对这一问题,本文对密封副材料性能以及密封副的几何结构参数进行分析并进行有限元模拟,总结二者对密封效果的影响法则后,在此基础上提出井下封堵球基于接触宽度和比压力的设计方式,为实际工程操作提供相应的理论指导。得出结论:若要同时增加接触宽度及密封比压进而提供封堵球密封性能,可采用小半锥角设计,并用具有高弹性模量的材料制作封堵球。
Plugging ball as a more commonly used sealing tool underground, at this stage is often designed by designers rely on experience to complete, the lack of relevant theoretical support, resulting in the sealing effect can not be guaranteed. In order to solve this problem, this paper analyzes the performance of the seal material and the geometrical parameters of the seal pair, and carries out the finite element simulation. After summarizing the law of the influence of the two on the seal effect, this paper proposes that the downhole seal ball is based on the contact width and Than the pressure of the design, the actual engineering operation to provide the appropriate theoretical guidance. Concluded: To increase the contact width and seal specific pressure to provide plug ball sealing performance, a small half-cone design can be used and a plug ball can be made of a material with a high modulus of elasticity.