Okla. Stat. tit. 52 § 318.3
Before entering upon a site for oil or gas drilling, except in instances where there are non-state resident surface owners, non- state resident surface tenants, unknown heirs, imperfect titles, surface owners, or surface tenants whose whereabouts cannot be ascertained with reasonable diligence, the operator shall give to the surface owner a written notice of his intent to drill containing a designation of the proposed location and the approximate date that the operator proposes to commence drilling.
Such notice shall be given to the surface owner in any manner as provided for in paragraph 1 and paragraph 2 of subsection C of Section 2004 of Title 12 of the Oklahoma Statutes for the service by personal delivery or by mail of a summons in a civil action. If the operator makes an affidavit that he has conducted a search with reasonable diligence and the whereabouts of the surface owner cannot be ascertained or such notice cannot be delivered, then constructive notice of the intent to drill may be given in the same manner as provided for the notice of proceedings to appoint appraisers.
Within five (5) days of the date of delivery or service of the notice of intent to drill, it shall be the duty of the operator and the surface owner to enter into good faith negotiations to determine the surface damages.
Okla. Stat. tit. 52, § 318.3