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2 1/2 in×Z1型旋转密封头在修井起下操作中,具有旋转而自封作用,并能承受井下较高的压力,以防止修井起下过程中井口溢流和井喷事故的发生。文章介绍了该型工具的结构密封效能和通过18口井生产实践所取得的密封效果与使用效果。实践证明,它是油田修井作业的找串、封串、挤水泥堵漏、封层注水泥塞、酸化以及小型压裂作业常用的配套工具。文章也对其现场使用应注意的几个问题作了介绍。
2 1/2 in × Z1 rotary seal head has the function of rotation and self-sealing during the process of working shaft repair and can withstand the high pressure in the well to prevent the well head overflow and blowout accident during the workover process . This article describes the structural sealing effectiveness of this type of tool and the sealing and using results achieved through 18 well production practices. Practice has proved that it is oil well workover to find string, seal string, cement plugging, sealing cement plug, acidification and small fracturing operations commonly used tools. The article also introduced several issues that should be noticed in the field use.