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.
引鞋的外部由钢制成，一般与套管的尺寸和螺纹匹配，如果钢级不匹配的话。
The outer portions of the guide shoe are made from steel, generally matching the casing in size and threads, if not steel grade.
针对测井仪器的引鞋种类单一，测井仪器下井过程时常发生阻卡，导致多次通井及重复处理，影响工作进度并使成本增加的问题，研制了滚动式被动牙轮测井畅通器。
The well logging tool is often blocked when it goes down or up in downhole, so a trip unblocking apparatus for the well logging tool in downhole is developed.
针对测井仪器的引鞋种类单一，测井仪器下井过程时常发生阻卡，导致多次通井及重复处理，影响工作进度并使成本增加的问题，研制了滚动式被动牙轮测井畅通器。
The well logging tool is often blocked when it goes down or up in downhole, so a trip unblocking apparatus for the well logging tool in downhole is developed.
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