Abstract: A method and apparatus are disclosed for protecting the weld area of polyolefin-coated steel pipe with an epoxy-based coating. The epoxy-based coating adheres well to the metal of the pipe, but does not adhere well to the polyolefin pipe coating. An intermediate bonding material therefore is applied to that portion of the polyolefin pipe coating which will be overlaid by the epoxy-based coating, prior to applying the epoxy-based coating. The intermediate bonding layer selected is one which will adhere satisfactorily to the metal of the pipe, to the materials of the polyolefin coating and to the epoxy-based coating.

Abstract: The improved coating of the present invention provides a protective coating for pipe, tubular shapes, other metal members, and metal structures. The protective coating comprises a polymer concrete, which is preferably a mixture of an organic resin, a filler material and a chemical activator. The organic resin is preferably a mixture of thermosetting polymer resins, such as bisphenol A based epoxy, bisphenol A based epoxy blended with polyglycol di-epoxide, and polyglycol di-epoxide. The filler material may be calcium carbonate, silica flour, zeosphere, talc, or kaolin, and preferably is of up to 200 mesh in size. The chemical activator preferably is an amine, such as aminoethylpiperazine or tetraethylene pentamine.

Abstract: The improved coating of the present invention provides a protective coating for pipe, tubular shapes, other metal members, and metal structures. The protective coating comprises a polymer concrete, which is preferably a mixture of an organic resin, a filler material and a chemical activator. The organic resin is preferably a mixture of thermosetting polymer resins, such as bisphenol A based epoxy, bisphenol A based epoxy blended with polyglycol di-epoxide, and polyglycol di-epoxide. The filler material may be calcium carbonate, silica flour, zeospheres, talc, or kaolin, and preferably is of up to 200 mesh in size. The chemical activator preferably is an amine, such as aminoethylpiperazine or tetraethylene pentamine.

Abstract: A method is provided for reducing the force required to move a pipe through a J-tube attached to an offshore platform by coating the pipe with hydrophilic polymer and then moving the pipe through the J-tube, or by introducing a solution of hydrophilic polymer and water into the J-tube and then moving the pipe through the J-tube.

Abstract: A method is provided for reducing the force required to move a pipe through a J-tube attached to an offshore platform by coating the pipe with hydrophilic polymer and then moving the pipe through the J-tube, or by introducing a solution of hydrophilic polymer and water into the J-tube and then moving the pipe through the J-tube.

Abstract: A method is provided for preventing sliding of a weight jacket on a pipe during tensioning of the pipe by disposing at least one spiral gripping means about the pipe, attaching at least one end of the gripping means to the pipe, and applying the weight jacket about the pipe and gripping means.

Abstract: A method for facilitating the removal or preventing the adherence of residual oil in oil tankers and other vessels or containers, on the surfaces of oil spill cleanup equipment such as skimmers and booms, and on sucker rods or other surfaces in oil wells, by coating surfaces contacting the oil with a film of a polymer that prevents or reduces oil adherence. Materials effective in reducing oil adherence are oleophobic films formed by complexing a polyacrylamide or carboxymethylcellulose with salts of polyvalent metals such as aluminum, chromium and iron.

Abstract: The present invention relates to a method of increasing the density of an aqueous liquid in a slurry by forming a solution of the aqueous liquid and saccharide.

Abstract: A process for reducing the flowing friction of a liquid hydrocarbon in a pipeline with a polymer soluble in the hydrocarbon by preparing a particulated, substantially undegraded polymer for introduction into a hydrocarbon by mixing the polymer with a solvent, surfactant, and water, whereby the polymer is dissolved, and forming polymer particles in the resulting liquid by flashing off the solvent and injecting the particles into the hydrocarbon.

Abstract: Sulfur compounds are removed from coal during preparation of the coal for pipeline transport and during pipeline transport of the coal by preparing the coal in particles sufficiently fine for transport as an aqueous slurry, mixing the coal particles with oxygenated water and a basic chemical substance, transporting the coal as a slurry in a pipeline, separating the coal from water containing soluble sulfur compounds and from sludge-containing insoluble sulfur compounds.

Abstract: A method for preventing the adherence of oil to sucker rods or other surfaces in oil wells, by coating the surfaces contacting the oil with a film of a polymer that prevents or reduces oil adherence. Among materials effective in reducing oil adherence is an oleophobic film formed by complexing carboxymethylcellulose with salts of polyvalent metals such as aluminum, chromium and iron.

Abstract: A method for facilitating the removal or preventing the adherence of residual oil in oil tankers and other vessels or containers, on the surfaces of oil spill cleanup equipment such as skimmers and booms, and on sucker rods or other surfaces in oil wells, by coating surfaces contacting the oil with a film of a polymer that prevents or reduces oil adherence. Materials effective in reducing oil adherence are oleophobic films formed by complexing a polyacrylamide or carboxymethylcellulose in the presence of water with salts of polyvalent metals such as aluminum, chromium and iron.