Abstract: 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.

Abstract: A siphon tube having a polymeric material into which at least one continuous reinforcing agent is embedded, and wherein the at least one reinforcing agent runs substantially the length of the siphon tube. The polymer material can be one or more polymers selected from one or more high density polyethylenes, one or more polyamides, and one or more fluoropolymers.

Abstract: Polyamides made from 1,6-hexanediamine, and the dicarboxylic acids 1,10-decandioic acid, 1,12-dodecanedioic acid, or 1,14-tetradecanedioic acid and terephthalic acid in specified proportions are particularly resistant to salt stressed (induced) corrosion cracking. This makes them particularly useful as vehicular parts which may be exposed to salts. Particularly when these polyamides contain tougheners and/or plasticizers they are especially useful for hoses and tubes.

Abstract: The present invention relates to the process of a system of pipes that convey any flowable medium, such as chemicals, food and in particular, oil and gas, and more particularly to a system of pipes having 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 done on the interior and/or the exterior of the pipes.

Abstract: The present invention relates to a pipe, especially an oil pipe, having a lining comprising a fluoropolymer adhered to its interior surface and a lining formed on its exterior surface. The interior and/or exterior lining may comprise a primer layer comprising a fluoropolymer, and preferably a perfluoropolymer and an overcoat or a preformed film adhered to the primer layer. Either the overcoat or the preformed liner also comprises a fluoropolymer, and preferably a perfluoropolymer. The surface of the lining facing the flowable media, such as oil, may be a pure perfluoropolymer to provide a particularly good non-stick surface for the oil.

Abstract: Polyamides made from 1,6-hexanediamine, and the dicarboxylic acids 1,10-decandioic acid and/or 1,12-dodecanedioic acid, and terephthalic acid in specified proportions are particularly resistant to salt stressed (induced) corrosion cracking. This makes them particularly useful as vehicular parts which may be exposed to salts. Particularly when these polyamides contain tougheners and/or plasticizers they are especially useful for hoses and tubes.

Abstract: Marine umbilicals are provided comprising polyamide compositions having good hydrolysis resistance and that may optionally contain plasticizer.

Abstract: A pipe or comprising a melt-mixed blend of polyamide and incompatible polyolefin and a compatibilizing agent where the polyamide exists as a discontinuous phase that is dispersed in a polyolefin matrix and wherein nanoclay is exfoliated in the polyamide phase. The pipe has enhanced resistance to the permeation of hydrocarbons relative to polyethylene. A method for making a pipe having enhanced resistance to the permeation of hydrocarbons.

Abstract: The present invention relates to a pipe, especially an oil pipe, having a lining comprising a fluoropolymer adhered to its interior surface and a lining formed on its exterior surface. The interior and/or exterior lining may comprise a primer layer comprising a fluoropolymer, and preferably a perfluoropolymer and an overcoat or a preformed film adhered to the primer layer. Either the overcoat or the preformed liner also comprises a fluoropolymer, and preferably a perfluoropolymer. The surface of the lining facing the flowable media, such as oil, may be a pure perfluoropolymer to provide a particularly good non-stick surface for the oil.

Abstract: Siphon tubes comprising at least one continuous reinforcing agent that runs substantially the length of the tube.

Abstract: The present invention relates to a pipe, especially an oil pipe, having a lining comprising a fluoropolymer adhered to its interior surface and a lining formed on its exterior surface. The interior and/or exterior lining may comprise a primer layer comprising a fluoropolymer, and preferably a perfluoropolymer and an overcoat or a preformed film adhered to the primer layer. Either the overcoat or the preformed liner also comprises a fluoropolymer, and preferably a perfluoropolymer. The surface of the lining facing the flowable media, such as oil, may be a pure perfluoropolymer to provide a particularly good non-stick surface for the oil.

Abstract: Multilayered composite articles comprising a first layer comprising melt-extrudable perfluoropolymer, a second layer comprising a fluoropolymer derived from tetrafluoroethylene, at least one perfluorinated ?-olefin; and vinylidene fluoride. The articles may be in the form of pipes, tubes, and hoses.

Abstract: A pipe or comprising a melt-mixed blend of polyamide and incompatible polyolefin and a compatibilizing agent where the polyamide exists as a discontinuous phase that is dispersed in a polyolefin matrix and wherein nanoclay is exfoliated in the polyamide phase. The pipe has enhanced resistance to the permeation of hydrocarbons relative to polyethylene. A method for making a pipe having enhanced resistance to the permeation of hydrocarbons.

Abstract: A pipe or liner for use in the oil and gas industry that comprises a melt-mixed bend of polyamide and incompatible polyolefin and a compatibilizing agent where the polyamide exists as a discontinuous phase that is dispersed in a polyolefin matrix. The pipe or liner has enhanced resistance to the permeation of hydrocarbons relative to polyethylene.

Abstract: Polymeric pipes with barrier layers are made by attaching to a pipe a multilayer structure which comprises a barrier layer and at least one irregularly surfaced sheet. The resulting pipes, which have reduced permeation to various substances, are useful for reducing loss of materials which are valuable, toxic and/or environmentally harmful.

Abstract: Pipes are provided wherein comprising polyamide compositions having good hydrolysis resistance and that may optionally contain plasticizer. Such pipes are suited for applications transporting hydrocarbons. The pipes of the present invention may be in the form of flexible pipes.

Abstract: A process for producing plasticized polyamide blends containing additives such as tougheners, reinforcing agents, and/or filler. High average molecular weight plasticized blends containing additives may be made using the process of the invention. Pipes and tubing may be made from the blends prepared using the process of the invention.

Abstract: Novel proppants useful in facilitating the hydraulic fracturing of subterranean formations are disclosed, made from filled polymers such as polyamides and polyesters. A process for the hydraulic fracturing of subterranean formations using filled polymeric proppants is disclosed.

Abstract: Marine umbilicals are provided comprising polyamide compositions having good hydrolysis resistance and that may optionally contain plasticizer.

Abstract: Polyamide compositions exhibiting superior hydrolysis resistance comprising copolyamide having a melting point that is less than or equal to about 240° C., at least about 30 ?eq/g of amine ends, and an inherent viscosity of at least about 1.2.