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- Improving well performance and integrity
Case studies



Key info

  • Region: UK North Sea
  • Customer: Premier Oil
  • Field: Brenda
  • Well Type: Subsea


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Case benefits

  • Retrofit Gas lift design to avoid a costly workover. Prior to intervention there was no production. Without the design work carried out by PTC petroleum engineers, straddles could have been set at the incorrect depth.

Key Capabilities

  • Gas lift for wells without side pocket mandrels or mandrels set at incorrect depths.

Typical Applications

  • Retrofit gas lift to increase oil production
  • Retrofit gas lift for gas well dewatering
  • Retrofit annulus to tubing bleed off

GoLift for Premier Oil

Retrievable Gas Lift Straddle
Retrievable Gas Lift Straddle
GoLift Straddle
GoLift Straddle
GoLift Straddle
GoLift Straddle
GoLift Straddle

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.

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