Gas lifted, gas vented or wells with sustained annulus pressure pose a considerable risk to personnel and facilities. In these applications annulus gate valves and ring gaskets are the primary well barrier. Gate valves provide only a single barrier, which can be breached upon impact or collision.
Regulatory and/or company requirements may demand mitigation for the associated risks.
The MSASTM, provides an additional independent barrier in the wellhead VR profile. The MSASTM is hydraulically operated and connected to ESD.