Mousehole (drilling)

The mousehole is the storage area on a drilling rig where the next joint of drilling pipe is held until needed. This hole is in the floor of the rig, bored into the earth for a short way, and usually lined with a metal casing known as a scabbard.

Not to be confused with Rathole (drilling) or Mousehole.
The mousehole of a drill rig

The purpose is to have the top of the piece of drill pipe on a level with the kelly when the time comes to add the new piece of drill pipe.[1]

References
  1. "mousehole". slb.com.


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