首页 >  Term: Rotary
Rotary

The machine used to impart rotational power to the drill stem while permitting vertical movement of the pipe for rotary drilling. Modern rotary machines have a special component, the rotary or master bushing, to turn the kelly bushing, which permits vertical movement of the kelly while the stem is turning.

0 0

创建者

  • Harry8L
  • (London, United Kingdom)

  •  (V.I.P) 574128 分数
  • 100% positive feedback
© 2024 CSOFT International, Ltd.