Planning and Execution of Pigging Procedure for Gas Pipeline

Abstract Multisize pipelines are widely used in offshore oil and gas production system; however, the inspection and cleaning process for these pipelines usually are more complex. The pigs used in Santos basin, such as porcupine pigs for inspection and varipigs for cleanning, require some restricions, like maximum pig speed to guarantee a good cleaning effectiveness and, mainly, to guarantee the pig structural integrity. The main purpose of this work is to evaluate the simulation effectiveness to estimate pig total travel time and pig speed profile, therefore assuring the pig integrity during the pigging process in a gas network with many platforms interconnected. The analysys will compare total travel time and structural integrity of pigs after they arrive in final destination, given the lack of a velocity profile information in these procedures.