Patent ID: 8453740
Filing Date: 2013-06-04
Classification: F16L,Y10T

Abstract:
1. Process of reducing the deposition of asphaltenes, paraffin wax, or inorganic scale in an oil well pipe used to convey oil from underground deposits by providing a system of pipes connected end to end for conveying oil comprising a first pipe and a second pipe, the second pipe having a lining adhered to the interior surface thereof, the lining comprising a primer layer adhered to the interior surface of the pipe and an overcoat or a preformed film comprising a fluoropolymer adhered to the primer layer, where the overcoat has an exterior anti-stick surface consisting essentially of baked perfluoropolymer, the anti-stick surface reducing the deposition in the oil well pipe of asphaltenes, paraffin wax, and or inorganic scale as compared to the interior surface of the oil well pipe without the lining being present, so as to avoid pluggage of said system of pipes, wherein the first pipe is unlined or lined with a lining of a different material than the lining of the second pipe.