By-pass pig passes test for two-phase pipelines

H.L. Wu Wu Flow Consultancy B.V. The Netherlands G. van Spronsen Shell International Exploration & Production B.V. The Netherlands E.H. Klaus BEB Erdgas & Erdöl Gmbh Hannover, Germany D.M. Stewart Shell Todd Oil Services Ltd. New Zealand A simulation model of the dynamics of a by-pass pig and related two-phase flow behavior along with field trials of the pig in a dry-gas pipeline have revealed significant gains in use of a by-pass pig in modifying gas and liquid production rates. The method can widen the possibility of applying two-phase flow pipeline transportation to cases in which separator or slug-catcher capacity is limited by practicality or cost. Pigging t...

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