Okla. Stat. tit. 42, § 17
Where one has a lien upon several things, and other persons have subordinate liens upon or interests in, some but not all of the same things, the person having the prior lien, if he can do so without the risk of loss to himself, or injustice to other persons, must resort to the property in the following order, on the demand of any party interested:
4. When several things are within one of the foregoing classes, and subject to the same number of liens, resort must be had:
R.L. 1910, § 3838.