Home > Term: rathole
rathole
A storage place for the kelly, consisting of an opening in the rig floor fitted with a piece of casing with an internal diameter larger than the outside diameter of the kelly, but less than that of the upper kelly valve so that the kelly may be lowered into the rathole until the upper kelly valve rests on the top of the piece of casing.
- Part of Speech: noun
- Industry/Domain: Oil & gas
- Category: Drilling
- Company: Schlumberger
0
Creator
- BSchmidt
- 100% positive feedback