密闭扩张式封隔器的研制及应用  

The Development and Application of the K344(1)-112 Airtight Expansion Packer

作　　者：王宏万[1] 马艳洁[1] 刘晋伟[1] 孙宝[1] 孙金锋[1] 郝恒泽[2] 郝加鹏[2] 

机构地区：[1]胜利油田分公司采油工艺研究院 [2]胜利油田分公司东辛采油厂

出　　处：《石油机械》2012年第3期91-93,共3页China Petroleum Machinery

摘　　要：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。As far as the expansion packer is concerned, there exist pressure fluctuation and automatic unsetting during the injection suspension, which will cause interlayer channeling. Considering this problem, the K344 （1） - 112 airtight expansion packer was developed. The packer is kept in sealing state in pressure fluctuation of water injection and shut-in injection suspension, so the problem of interlayer channeling has been solved. Two unsetting methods were designed. One method is reverse well flushing unsetting method; the other is string-lift unsetting method. The packer is subject to axial compression in water injection, thus stress concentration on the packer rub- ber end is effectively relieved and the service life of the packer is lengthened. The packer was applied to 53 sepa- rate-layer injection wells in Shengli Oilfield in the experiment with a 100% success rate of operation. The packing of the packer is reliable and interlayer channeling can be prevented. The two unsetting methods are reliable in unset- ting and they can satisfy the requirement of backwashing and string tripping.

关 键 词：密闭扩张式封隔器 层间窜通 解封 洗井 

分 类 号：TE934[石油与天然气工程—石油机械设备]