脱接器是有杆机械采油中连接抽油杆和抽油泵的关键部件。脱接器下接头是脱接器中一个重要零件,它的一端与抽油泵相连,另一端与锁套相接(见图1)。由于脱接器一般都在千米深的井下工作,井下温度较高,腐蚀介质复杂,工况比较恶劣,一旦损坏,更换脱接 The disconnector is a key component in sucker rod mechanical oil extraction connecting sucker rod and sucker rod pump. The lower connector of the disconnector is an important part of the disconnector. One end of the disconnector is connected to the oil pump and the other end of the disconnector is connected with the lock sleeve (see FIG. 1). As the disconnectors are generally underground work in the depth of 1000 meters, the underground temperature is higher, the corrosive medium is complex, the working conditions are harsh, once damaged, replace the connection