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Asphalt-resin-paraffin deposits deposited in the extraction of oils considered difficult to recover are investigated. Specific features of asphalt deposition of resin-paraffin deposits, caused by different content of high-molecular components in them and their properties, are revealed. Redistribution of petroleum paraffin hydrocarbons and asphaltenes between oil and asphalten-resin-paraffinic deposits deposited from them is shown. The process of precipitation of high-molecular components from heavy oil under dynam...