Phillips Petroleum Company

Atlantic Richfield Company

Gregory R Ruschau

William Mark Bohon

Daniel J Eck

A method for inhibiting external corrosion on an insulated pipeline including a pipe insulation positioned outside and around the pipe and a coating material around the insulation by positioning a plurality of concentrated charges of alkaline material in the insulation material.

Method for inhibiting corrosion under insulation on the exterior of a structure

A pipeline supported by a plurality of spaced, movable supports. The supports are not anchored but are movable with respect to the surface of the earth (e.g. tundra) thereby allowing the pipeline to move in response to temperature/pressure changes in said pipe. The supports are sized so that the pipeline will be elevated above the surface of the tundra at a height sufficient to allow water to flow under the pipeline as well as allowing small animals to pass thereunder. The movable supports may be either rolling supports which lie directly on the surface or sliding supports which are positioned on slidable stands or combination of both.

Movable supports for pipelines

A method for inhibiting external corrosion on an insulated pipeline including a pipe and a coating material around the pipe by positioning an alkaline material in the coating material.

Method for inhibiting external corrosion on an insulated pipeline

Carbon steel surfaces, particularly inside wall surfaces of steel pipelines, are treated with an organosilane coupling agent to improve the adhesion of epoxy, vinyl ester and similar polymer-type protective coatings to the surface. The organosilane coupling agent is applied to a cleaned steel surface in an aqueous and/or alcohol solution, the surface is dried to allow the organosilane to cure and the protective coating is then applied to the surface. Steel pipelines are coated in situ by cleaning the interior of the pipeline with hydrochloric acid, fresh water and a passivation agent such as phosphoric acid followed by pumping a slug of the organosilane coupling agent, in solution, through the pipeline between spaced apart pigs. The coupling agent is dried and a polymer coating is then applied by pumping a slug of the coating through the pipeline, also between two spaced apart pigs.

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Delaware, OH, United States of America

Gregory R Ruschau