I recently bought a house my wife thought it would be a good idea to shut the door to one of the rooms.
How to drill a door lock open.
How to drill different cylinder locks including very poor footage of one being drilled.
Understand the lock well enough to drill it properly.
When a replacement lock can be found then the lock can be drilled open.
Most locks have about five tumbler pins to drill through although some have six or more.
Certain locks are not going to open as easily as others even with drilling.
Drilling without replacing the hardware will result in an unacceptable gap in home security.