Key Technologies for a Detachable Bi-Directional Anchoring Suspension Packer
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摘要:
针对常规双向锚定封隔器存在的提前坐挂坐封、密封失效和坐封后无法解挂等问题，研制了集成重载锚定、高压密封、防提前坐封和解挂等多种功能的可解挂双向锚定悬挂封隔器，开展了高承载技术、高压密封技术、防提前坐封技术和解挂技术等关键技术研究，并采用有限元方法分析了整体式卡瓦张开后的应力应变情况。性能测试结果表明，各功能单元的性能参数均达到了设计要求。可解挂双向锚定悬挂封隔器在20多口井进行了现场应用，坐挂坐封均成功，解决了常规双向锚定封隔器存在的问题。可解挂双向锚定悬挂封隔器的成功研制，为多种完井工艺的顺利实施提供了一种可靠的锚定封隔工具。
Abstract:Due to the fact that the conventional bi-directional anchoring packer has problems, which include pre-setting/suspending, sealing failure, and failed detachment after packer setting, the detachable bi-directional anchoring suspension packer that has multi-functionality, including heavy-load anchoring, high-pressure sealing, prevention of pre-setting and detachment was developed. The technical research was conducted on high load-bearing technology. In addition, they studied high pressure sealing technology, and the prevention of pre-setting and detachment. A finite element method was used to analyze the stress and strain after the integrated slip is opened. The results of the surface performance evaluation showed that the performance parameters of each module could meet design requirements. The field application of this packer has been conducted in 20 wells, and the suspension and setting were all successful, which solves the hidden dangers of conventional bi-directional anchoring packers. The successful development of detachable bi-directional anchoring suspension packer provides a reliable anchoring and sealing tool for the smooth implementation of various completion technologies.
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Keywords:
- packer /
- bi-directional anchoring /
- staged fracturing /
- detachment
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图 1 可解挂双向锚定悬挂封隔器结构
Figure 1. Structure of detachable bi-directional anchoring suspension packer
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图 6 可解挂式双向锚定封隔器与解挂工具的结构
Figure 6. Structure of the detachable bi-directional anchoring packer and detachment tool
表 1 整体式卡瓦材料的参数
Table 1 Materials parameters of integrated slip
材料 弹性模量/GPa 泊松比 屈服强度/MPa 20CrMnTi 207 0.25 850 35CrMo 206 0.30 758 
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