bottom hole cleaning

例句：

1. 1.The engineers used a bottom hole drilling technique to clean the well.
   工程师们使用一种底部钻孔技术来清洁井。
2. 2.During the drilling process, it is necessary to perform bottom hole cleaning to ensure the integrity of the well.
   在钻井过程中，进行底部钻孔清洗以保持井的完整性是必要的。
3. 3. The bottom hole cleaning process helps to remove any debris that may have been left behind during the drilling operation.
   底部钻孔清洗过程有助于去除在钻井操作中可能遗留的任何碎片。