探洞器用来检查、确定机井的破坏位置和损坏部位的形状,其结构及使用方法见图1。探洞器可在井管内自由上下和转动,当探洞器碰着破洞时,弹簧会将滑套自动顶入洞内(记下破洞深度),如探洞器上下左右的活动范围有限,说明坏的地方是破洞;如探洞器能转动一圈,说明井管脱节或断了,根据探洞器 The caverns are used to check and determine the damage location of damaged shafts and the shape of damaged parts. The structure and operation method of the caverns are shown in Figure 1. The caverns are free to move up and down in the well pipe. When the caverber touches the hole, the spring automatically pushes the sleeve into the hole (note the depth of the hole). For example, the range of activities of the cavern is limited , Indicating that the bad place is a hole; if the caver can be turned around, indicating well pipe disconnected or broken, according to caverns