毕业设计（论文）-可伸缩热采封隔器的设计精选.doc

可伸缩热采封隔器的设计 摘 要：由于目前热采封隔器多采用热胀式，该类型封隔器没有管柱受热膨胀补偿装置，而且解封时要降温，但注完蒸汽后井温很难降低，造成解封困难，密封效果不好。针对这些问题，设计了可伸缩热采封隔器。该封隔器主要由密封机构，坐封机构，解封机构，扶正锚定机构，热力伸缩补偿机构，安全脱卡机构组成。它将封隔器与伸缩管设计成一体，确保了管柱受热膨胀并简化了热采管柱的结构；采用V形膨胀石墨密封圈组成密封系统，确保伸缩管热力伸长时封隔器的密封性；采用左旋上提管柱坐封，右旋脱锁，上提管柱解封，操作过程中不需降温，确保了坐封与解封的可靠性。 与常规热采封隔器相比，该封隔器上提坐封时操作简单、安全，坐封显示准确；注汽施工过程中，封隔器悬挂在套管内，承受单向压差；采用碟形弹簧压力补偿复合式密封件，密封性能好；上提管柱解封时操作方便，封隔器解封顺利。 关键词：热采封隔器；伸缩管；密封；热力补偿；结构设计 Scalable Packer Of Thermal Recovery Abstract：Most of thermal recovery packers being used currently are thermal expansion packers. With poor sealing performance, those packers have no compensation device of the tubing’s thermal expansion and are all difficult to be released because lowering the downhole temperature is not easy to be achieved which is essential to releasing operation. To solve these problems, a scalable packer of thermal recovery is developed. It is composed of sealing mechanism, seating mechanism, releasing mechanism, stabilizing and anchoring mechanism, compensation mechanism of thermal expansion and safety-ensured slip-relieving mechanism. With compensating pipe in the packer, it simplifies the structure and compensates the tubing’s thermal expansion. The application of V-expanded graphite ring increases the sealing quality, mechanical seating and releasing system ensuring the reliability of seating and releasing. Compared with conventional thermal recovery packer, this packer has such advantages as accurate seating, bearing just one direction’s pressure during downhole operation, good sealing performance, simple but reliable releasing system and so on. Key words：thermal recovery packer；compensating pipe；thermal compensation； sealing；structural design 目录 1 绪 论 1 1.1 题目意义 1 1.2 国内外发展现状 2 1.3 主要设计内容 3 1.3.1 设计技术参数 3 1.3.2 结构及性能特点 3 2 封隔器基本标准 4 2.1 封隔器的分类 4 2.2 封隔器的型号编制 4 2.3 代号说明及应用举例 4 2.4 油田用封隔器的通用技术条件 5 2.5 封隔器的应用 6 2.6 封隔器设计原则 6 3 总体方案与结构设计 8 3.1 总体方案设计 8 3.1.1 结构组成 9 3.1.2 工作原理 9 3.1.