RE: Drilling Break20 Jun 2023 22:19
Drilling break:
1.
A sudden increase in the drill bit’s rate of penetration.
It sometimes indicates that the bit has penetrated a high-pressure zone and thus warns of the possibility of a kick.
2.
A sudden increase in the rate of penetration during drilling.
When this increase is significant (two or more times the normal speed, depending on local conditions), it may indicate a formation change, a change in the pore pressure of the formation fluids, or both.
It is commonly interpreted as an indication of the bit drilling sand (high-speed drilling) rather than shale (low-speed drilling).
The fast-drilling formation may or may not contain high-pressure fluids.
Therefore, the driller commonly stops drilling and performs a flow check to determine if the formation is flowing.