GAS INJECTION AT RISER BASE SOLVES SLUGGING, FLOW PROBLEMS

02/26/1990
T.J. Hill BP Research Sunbury Research Centre Sunbury-on-Thames, U.K. Test-rig studies and operating experience by BP International have shown that riser-base gas injection can help prevent severe slugging and smoothen start-up transients in subsea pipelines. The studies were based on predictions that multiphase lines proposed as part of the Forties field extension would be subject to severe slugging. Test-rig studies were undertaken to analyze severe slugging and to demonstrate gas injection as a means of prevention. Following scale-up studies, riser-base gas injection systems were installed on both 12-in. production and 6-i...
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