密闭扩张式封隔器的研制及应用
China Petroleum Machinery(2012)
Abstract
针对扩张式封隔器在应用中存在压力波动及停注时自动解封,易造成各层之间窜通的问题,研制了K344(1)-112密闭扩张式封隔器。该封隔器在注水压力波动及关井停注时依然保持密封状态,解决了层间窜通问题。设计了2种解封方法:一是反洗井解封法,二是上提管柱解封法,方便实用。注水时封隔件轴向压缩,有效缓解胶筒端部应力集中,提高密封效果,延长封隔器使用寿命。该封隔器在胜利油田的53口分层注水井中进行试验应用,施工成功率100%。封隔器封隔可靠,可防止层间窜通。2种解封方式解封可靠,能满足反洗井和起管柱作业的要求。
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Key words
well flushing,unsetting,sealing expansion packer,interlayer channeling
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