我们从兄弟油田引进一种井下打捞倒扣工具—倒扣器,通过使用,证明效果好。这种倒扣器的结构如图1,由主体1、胀扣套2和胀心轴3,三部分组成。这种倒扣器的使用方法:当井下因卡钻或发生其他事故,需要倒扣打捞时,将倒扣器接在打捞钻具下部,下入井内,在倒扣器 We have introduced a downhole salvage buckle-down fastener from our brother oilfield, which proved to be effective through its use. The structure of such a fastener is shown in FIG. 1, which is composed of a main body 1, an expansion sleeve 2, an expanding mandrel 3 and three parts. The use of such a backslip: When the downhole due to stuck or other accidents, the need to rebuild the salvage, the backslip connected to the bottom of the salvage drill, into the well, under the fastener