Coated pipes for conveying oil
AssigneeE.I. du Pont de Nemours and Company
InventorLaurence McKeen
Life of this patent
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Abstract
The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.
Claims34
An oil pipe having a lining adhered to the interior surface of the pipe, the lining having a surface exposed to the oil, the exposed surface consisting of a perfluoropolymer.
An oil pipe having a lining, the lining comprising a primer layer adhered to the interior surface of the pipe, and an overcoat comprising a fluoropolymer disposed on top of the primer layer, where the overcoat has an exterior surface exposed to the oil.
An oil pipe having a lining comprising a plurality of particles which form a mechanical barrier against permeation of water to the pipe.
Process for coating the interior surface of an oil-conveying pipe, comprising adhering a lining consisting of a perfluoropolymer to the interior surface of the pipe.
Process for coating the interior surface of an oil-conveying pipe, comprising adhering a lining comprising a primer layer comprising a fluoropolymer to the interior surface of the pipe and adhering an overcoat to the primer layer.
Process for coating the interior surface of an oil-conveying pipe, comprising lining a pipe with a lining comprising a plurality of particles which provide a mechanical barrier against permeation of water to the pipe.
Process of reducing the deposition in an oil well pipe of at least one of asphaltenes, paraffin wax, and inorganic scale by providing a lining adhered to the interior surface of the pipe wherein the surface of the lining exposed to the oil consists of perfluoropolymer.
Process of reducing the deposition in an oil well pipe of at least one of asphaltenes, paraffin wax, and inorganic scale by providing a lining adhered to the interior surface of the pipe wherein the lining comprises a primer layer adhered to the interior surface of the pipe, and an overcoat comprising a fluoropolymer disposed on top of the primer layer and having an exterior surface exposed to the oil.
Process of imparting corrosion resistance to an oil well pipe by providing a lining to the pipe, where the lining comprises a plurality of particles which form a mechanical barrier against permeation of water, solvents and gases to the pipe.
Dependencies are inferred from the claim text.