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.
部井段地层的硬度高、研磨性强，钻头选型困难，特别是在高密度条件下机械钻速
。
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.
部井段地层的硬度高、研磨性强，钻头选型困难，特别是在高密度条件下机械钻速。
声明：以上例
、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达
不代表本软件的观点；若发现问题，欢迎向我们指正。
