The deep formation has a high degree of hardness and abrasivity;the bit type selection is difficult and the ROP is low especially under the high density mud.
深部井段地层的硬度高、研磨性
，
选型困难，特别是在高密度条件下机械速
。
The deep formation has a high degree of hardness and abrasivity;the bit type selection is difficult and the ROP is low especially under the high density mud.
深部井段地层的硬度高、研磨性，选型困难，特别是在高密度条件下机械速。
声明：以上例句、词性分类均由互联网资源自
，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
