Definition(s)
Drilling Break
A change in the rate of penetration that may or may not be a result of penetrating a pressured reservoir.
Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards
Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global Standards