Disclosed is a process for reducing the deposition of asphaltenes, paraffin wax, or inorganic scale in an oil well pipe by providing a system of pipes that convey any flowable medium, such as oil and gas. More particularly the system of pipes is provided with different coatings or linings for the interior and exterior surfaces of such pipes, depending on the environment in which the pipes are used. The pipes may be coated with different materials, which may be of different thicknesses, with various configurations of coatings or linings. Such coating may be on the interior and/or exterior of the pipes.