Cleaning pipeline interiors using gel pigs

摘要: The interior of a pipeline is cleaned using polymeric gel pig hydroxyethyl or hydroxypropyl cellulose reacted by redox reaction with vinyl phosphonic acid. formed hydrating the polymer in an aqueous liquid, and crosslinked addition Lewis base Bronsted-Lowry base. Contaminants entrained during cleaning process may be separated pH reducing agent to pig, whereby viscosity caused decrease. used for further after contaminant separation additional quantity