Abstract: To solve the problems in conventional slip-type liner hanger, expandable liner hanger is used for hanging well completion service. Expandable liner hanger has a series of characteristics, such as large drift diameter, short overlay segment, simple structure, solid hanging, small pedestal seat and wide applicable scope. This paper elaborates about the structural principles, process principles and application cases of expandable liner hanger used in three well completion methods - liner cementing, screen completion and half of cementing-and summarizes the applicable scope of the developed expandable liner hanger. This device has reliable annular sealing and liner hanging functions without the advanced packing risk in the tripping-in process. Currently, it has been used in more than 180 wells both at home and abroad, achieving good results in well completion service.

Key words: expandable liner hanger, liner cementing, screen completion, half of cementing

摘要： 针对常规卡瓦式尾管悬挂器存在的缺陷, 采用膨胀式尾管悬挂器进行悬挂完井作业。膨胀式尾管悬挂器 拥有通径大、重叠段短、结构简单、悬挂牢靠、台阶小、适用范围广等特点, 分别对尾管固井、筛管完井及半程固井3 种完井方式的膨胀式尾管悬挂器的结构原理、工艺原理及实施案例作了阐述, 总结了研发的膨胀式尾管悬挂器的适用 范围。该装置具有可靠的环空密封和尾管悬挂功能, 且下入过程无提前坐挂风险, 在深井超深井中独具优势。目前已 在国内外投入应用180 余口井, 取得良好效果。

关键词: 膨胀式尾管悬挂; 尾管固井; 筛管完井; 半程固井