Okla. Stat. tit. 58, § 52

A. When a copy of the will and the order or decree admitting same to probate, duly certified, shall be produced by the executor, or by any other person interested in the will, with a petition for letters, the same must be filed, and the court or judge must appoint a time for the hearing, notice whereof must be given as provided for an original petition for the probate of a will. B. Regardless of the value of the estate, any will admitted to probate in another jurisdiction may be admitted to probate and administered under the procedures prescribed pursuant to Section 241 or 245 of this title.