管靴[guǎn xuē]
（用作槽子或管口的装置） shoe
1. pipe boot：pipe bit 管钻 | pipe boot 管靴 | pipe bushing 管衬套
1. 这些措施减少钻孔事故，节约了钻具、管靴和套管损耗，提高了工作效率，节约工期。
These measures reduce the drilling accident, saving the drilling, casing pipe boots and losses, improve efficiency, save time.