Pressure control device with safety locking mechanism

Abstract

A well pressure control device includes a housing having a through bore. A pressure chamber has a piston movably disposed therein. The pressure chamber is coupled at one end to the housing transversely to the through bore. The actuating piston defines a pressure source side and a through bore side of the pressure chamber. A fluid pressure source is coupled to the other end of the pressure chamber. A closure element is disposed in the pressure chamber on the through bore side. At least one locking element is coupled to the pressure chamber at an axial position along the pressure chamber on the through bore side

Dependencies are inferred from the claim text.