Overpulls/ Stuck Pipe In Surface Hole
If any tight hole is experienced when drilling with water the followint actions should be taken to prevent stuck pipe:
- With kelly: Immediately pull the string back to above the tight spot (after having spotted a viscous slug) and ream the complete interval until no more overpull is experienced.
- With top drive: Backream out of the hole, and ream into the hole until the drag has disappeared.
When heavy overpulls are experienced, and the above precautions have been taken, but the weight indicator regularly indicate a drop . . .