What is a Full Opening Safety Valve (TIW valve)?
A Full Opening Safety Valve, commonly referred to as a TIW valve, is a high-pressure ball valve designed to be stabbed into the drill string to shut in a well during well control events.
There are two primary types of stabbing valves that must be prepared for well control situations: the Full Opening Safety Valve (TIW valve) and the Inside BOP valve (Gray valve). Both play essential roles in maintaining drilling safety, but they serve different operational purposes.
In short, TIW valves are an essential part of any drilling operation, particularly in high-pressure environments where rapid response and pressure control are required.
But what exactly is a TIW valve, and how does it function in real-world drilling operations?