游动阀是指钻探施工中装在抽油泵柱塞上随柱塞作往复运动可将泵内液体排出的单向球阀。
图1所示是各种密封和游动阀在柱塞上的位置。
Figure 1 shows the various seals and traveling valve in the plunger position.
在下游动阀罩下部连接有引鞋， 引鞋上开有导流通孔和导流槽。
The lower part of the lower traveling valve is connected to a guide shoe with diversion hole and diversion trench.
这种抽油泵柱塞游动阀采用机械强制开启和关闭的结构，柱塞为等径光管、浮动结构，可防止发生气锁游动阀、阀球关闭滞后、砂卡柱塞现象。
The travelling valve of the pump is designed to be closed and opened forcibly, and the pump plunger adopts equal-diameter bare pipe with a floating structure to prevent gas lock and sand sticking.
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