介绍了一种新型可取可钻高压桥塞,它具有高压密封结构、双锁定结构、双向锚定结构与安全解封结构.该型桥塞80%的材料为可钻材料,这些结构特点决定了该型桥塞具有现场坐封、打捞、解封操作简单、施工方便可靠;桥塞承受上、下压差大(最高可达70MPa)、使用一次成功率高;即使在常规打捞不能解封的情况下可很容易通过钻磨解封,不会造成井下大修事故等特点.该型桥塞适用于油田勘探、开发中油气井的封堵底水、选层酸化、压裂及上返试油等管柱工艺措施中.

In order to study the influence of geometrical parameters of packer element on its sealing function, ANSYS Parametric Design Language (APDL) is applied to program the contact finite element. By studying the relationship between geometrical parameters of packer element and its peak contact pressure and optimization of parametric variables, the results show that the total thickness of packer element has greater influence on its sealing function than the sub-thickness does. There is an optimum scheme for the height of packer element which influences the sealing function. The choice of contact angle between packer element and rings should be careful. Comparing to original plan, the optimum solutions shows that height and contact angle decrease 37.5%, 8.9% respectively, and peak contact pressure increases 13.38% by optimizing the height and contact angle.

文章运用工程流体力学理论,分析计算了同心管分层注水管柱中同心内管及两管环空中的流体在不同流态下流动时的沿程阻力损失和局部阻力损失.为同心管分层注水工艺的现场实施提供了理论依据.