Deep blade configuration makes it possible to obtain high ROP in soft to medium formations and effective cooling in harder and more abrasive formations.

 
  • 深刀翼使其可能在鉆軟至中硬地層中獲得高鉆速;并在有一定研磨性的硬地層中有效地冷卻鉆頭.
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan