دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a neoprene ball that is run in a pipeline to clean it, to displace liquid hydrocarbons from natural gas pipelines, or to separate batches in liquid shipment. 2. a ball made of neoprene or other material that is put into a pipe prover to activate switches on the prover so that a known volume of petroleum or product is measured.