Okla. Stat. tit. 60, § 8

A thing is deemed to be incidental or appurtenant to land when it is by right used with the land for its benefit, as in the case of a way or watercourse, or of a passage for light, air or heat, from or across the land of another. Sluice boxes, flumes, hose, pipes, railway tracks, cars, blacksmith shops, mills, and all other machinery or tools used in working or developing a mine, are to be deemed affixed to the mine.