Liquid removal process in pipelines, using a moving piston.

摘要

This process is for use in gas pipelines, where the condensate liquid is withdrawn by passing a cylinder (1) made out of a spongy polymeric material, propelled by a small pressure difference between the trailing part of the above mentioned cylinder and its front part, so that the displacement of the cylinder along the internal surface of the pipeline pushes the above mentioned condensate. The piston is made out of a spongy material, preferably flexible spongy polyurethane with a density lower than 40 kg/m<3> that suffers a maximum dimensional loss of 0.50% after travelling pipelines with a total length of more than 1000 km. <IMAGE>