Retrofit Gas Lift System for Premier Oil's Brenda D3
An existing subsea gas lifted oil well in the Central North Sea stopped producing. The existing third
party gas-lift system was comprised of 2 x IPO unloading valves and an operating valve. Due to an error in
the gas lift design continuous gas injection could only be achieved via the uppermost IPO unloading
valve. The uppermost IPO unloading valve eventually failed and it was no longer possible to inject lift gas
into the well, stopping production.