抽油机曲柄叉头膨胀器是在更换抽油机减速箱时用来胀开曲柄叉头的一件专用工具,它利用了螺旋推力来撑开曲柄叉头,具有结构简单、使用方便、安全可靠的特点。现场应用情况表明,与传统拆卸方法相比,平均每井次的维修作业时间可缩短80min左右,作业人数可减少1～2人。 Crank Suction Crank Crank Expander is a special tool used to open the crank fork when replacing the gearbox of the pumping unit. It uses the screw thrust to prop open the crank fork, which has the advantages of simple structure, convenient use and safety Reliable features. The field application shows that compared with the traditional disassembly methods, the average maintenance time per well can be shortened by about 80 minutes and the number of workers can be reduced by 1 ~ 2 people.