Okla. Stat. tit. 12, app 1 R. 1.61
An appeal from these interlocutory orders of the district court may be commenced by filing a petition in error (and fourteen (14) copies) in conformity with Rule 1.63, filing an entry of appearance in conformity with Rule 1.23, and remitting to the Clerk of the Supreme Court the statutory cost deposit (or affidavit in forma pauperis), all within thirty days of the date the order, conforming to the statutorily required form, was filed in the trial court, or from the date of mailing if taken under advisement. See 12 O.S. §§ 696.2, 696.3. 990A(A). See Rule 1.40 for rules applicable to appeals from interlocutory orders and the effect of a motion for new trial. A petition in error appealing an interlocutory order appealable by right will be deemed filed when mailed in compliance with Rule 1.4. See Rule 1.4(e).
Okla. Stat. tit. 12, app 1 R. 1.61