Definition(s)
Valve drilling operation
Drilling of a hole through the blocking element of a valve that is stuck in the closed position with pressure on the well side of the valve. The drilling is accomplished through a lubricator assembly that confines the pressure after the blocking element is penetrated.
Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards
Valve drilling operation
“Valve drilling operation” means the drilling of a hole through the blocking element of a valve that is struck in the closed position with pressure on the well side of the valve.
[Mich. Admin. Code R 408 (2013)].
Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. Regulations