Okla. Stat. tit. 52, § 52

For the purpose of acquiring necessary right-of-way, every such person as defined in this act is hereby granted the right of condemnation by eminent domain, and the use of the highways in this dtate, for the purpose of transporting petroleum, liquid or liquifiable hydrocarbons and chemicals, except coal, which are transportable by pipeline, and for the location, laying, construction, maintaining and operation thereof.