首页 >  Term: Kelly cock
Kelly cock

A valve installed at one or both ends of the kelly. When a high-pressure backflow occurs inside the drill stem, the valve is closed to keep pressure off the swivel and rotary hose.

0 0

创建者

  • Harry8L
  • (London, United Kingdom)

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