ROY M. TEEL, ARLIE D. TEEL, ROY M. TEEL COMPANY, INC., AND SJM, INC. APPELLANTS,
v.
PUBLIC SERVICE COMPANY OF OKLAHOMA, TRANSOK PIPELINE COMPANY,
APPELLEES.

¶1 The questions presented are: whether Transok Pipeline Company and Public Service of Oklahoma (appellees/purchasers), must account for the fair market value of gas produced on leases in which Roy M. Teel, appellant, owned a working interest, and if so, the market value of the gas; whether the purchasers converted Teel's gas; whether the purchasers were unjustly enriched by investment of the gas proceeds; whether the purchasers must account for interest; whether this appeal was properly and timely brought; and whether the right to appeal was waived by acceptance of funds held in suspense by the purchasers. We find the appeal was properly and timely brought, and that limited to the facts presented here a pipeline purchaser who buys gas from a cotenant/operator is a converter after notice is received that the other cotenant has revoked the operator's right to dispose of the gas.¹ However, because Teel will receive interest under the conversion statute, we do not find that the purchasers were unjustly enriched.

¶9 A cause of action embodies all theories of recovery or damages which emanate from one occurrence or transaction.² In this case, Teel's cause of action arose from the breach of his rights concerning production from five wells. Teel originally requested that he be allowed to place a split connection on the wells and to take all the gas produced until the imbalance was corrected. By amendment to the petition, he alleged the possibility of conversion e.g., if the wells did not contain enough gas to balance his breached rights. Conversion is an alternative theory of relief, not a separate cause of action. In any event Teel dismissed the cause of action against the operators after settlement and proceeded on the amended petition seeking damages for the purchasers conversion and interest.

¶11 Before the enactment of the new pleading code, 12 O.S.Supp. 1984 § 2008 , issues were raised only by allegations of fact contained in the body of the pleading, and the prayer for relief was not considered part of the pleading. Here, Teel explicitly asserted recovery for interest on the escrow account as an element of his cause of action. The disposal of a segment of a cause of action is not a judgment but an interlocutory summary adjudication, a limitation on the issues to be tried, subject to alteration or modification by the trial court before final judgment. The trial court retains full power to make one complete judgment and dispose of all aspects of the action. An interlocutory summary adjudication does not form an appealable order.³ The order of October 22, 1982, did not dispose of all the issues in controversy. The final order from which an appeal could be properly and timely brought was September 20, 1983.

¶13 The general rule is that a party who voluntarily accepts benefits of a [767 P.2d 396] judgment waives the right to appeal.⁴ An exception is made if, on appeal, it is possible to obtain a more favorable judgment without the risk of a less favorable judgment. Acceptance of the benefits of the judgment is not inconsistent with an appeal if it is lodged solely to obtain a more advantageous judgment - i.e., a no-risk appeal.⁵ It is undisputed that at a minimum Teel was entitled to the money in escrow. Teel does not argue that the amount awarded is not due but that amount and an additional amount should be awarded. Teel has not waived his right to appeal because the actions taken by him are not inconsistent with his position on appeal.⁶

¶15 The owners of undivided interest in oil and gas rights are tenants in common. Each of the cotenants may develop the common property but not to the exclusion of the other cotenants.⁷ When gas is discovered by one cotenant, the cotenant may deduct the necessary expenses of developing, extracting, and marketing;⁸ but an accounting must be made to the other cotenants for the pro rata share of the production.

¶16 A tenant in common may lease his/her interest in production without the consent of other cotenants, but in the absence of an express agreement, one cotenant is not an agent of the other. A gas sales contract executed by a cotenant is limited to his/her interest. However, if cotenants name a cotenant as operator to exploit the cotenancy for their mutual profit, they become coadventurers in the enterprise and stand in a fiduciary relationship to one another.⁹ Teel, Siegfried, and Collins each owned working interests in the wells. Siegfried and Collins were named the operators, and the operating agreement specifically provided:

¶17 Teel does not dispute that he has not taken his gas in kind or disposed of it in another manner. The agreement gave the operators the discretionary right to sell Teel's interest until he revoked the authority on November 17, 1977. Teel also does not dispute that the purchasers took delivery of Teel's gas which was produced by the operators. The trial court found that the operator had bought and sold Teel's gas to Transok and PSO. Under the operating agreement, the operator had the right to do this until revocation. The operators were duty bound to act as a reasonable and prudent operator and police the production of the well because of its fiduciary relationship with Teel as a co-tenant.¹⁰

¶18 A division order consists of an agreement between the working interests and the purchasers which provides a formula for payment of the purchaser's price of gas. Its function is to protect the purchaser from liability.¹¹ Nonetheless, the purchaser is not protected unless the owners of the interest sign the division order.¹² In the absence of an executed division order¹³ and in the presence of notice that the non-contracting cotenant has revoked the operator's right to sell, failure of a purchaser to account to each working interest owner for his/her pro rata share of the proceeds subjects the purchasers to the same liability as the operator and the purchaser may become a converter of the property.¹⁴

¶19 However, the purchaser must exhibit bad faith or have knowledge that the gas purchased exceeds the ultimate share allotted to the working interest. If so, the purchaser is assessed damages based on the contract price of the underproduced working interest. Otherwise, the purchaser is liable only to the extent that the working interests have been paid under the sales contract. The purchaser may pursue each working interest under the indemnification clause contained in the gas sales contract. In this case, Teel did not sign the division order until he was ordered to do so by the trial court in September, 1983. The purchasers were aware of Teel's interest because they attempted to reach an agreement with him several times and were in receipt of a copy of his letter revoking the operators' right to deliver his gas to the purchasers.¹⁵ After receiving [767 P.2d 398] the revocation, the purchaser was a converter because it purchased Teel's gas from an operator which was not authorized to deliver it.¹⁶

¶20 Teel contends that because the purchasers have taken his gas, they are liable for the statutory damages for conversion. In an action for the conversion of property, the measure of damages is the fair market value of the property at the time of conversion and interest thereon - if the party pursues the suit with diligence. An election may be made to take the highest fair market value of the property with interest at any time between the conversion and the verdict.¹⁷ Because the trial court refused presentation of any evidence concerning the market value of the gas, this issue is remanded for consideration by the trial court.¹⁸

¶21 The pipeline purchasers submit that Tara Petroleum Corp. v. Hughey, 630 P.2d 1269, 1273 (Okla. 1981), is determinative. In Tara, the lessor sued the lessee to establish market value for gas sold under a royalty provision in the lease. A royalty interest is an interest in production where property is under an oil and gas lease.¹⁹ Tara was specifically limited to a market price gas royalty clause - this is not the question before us. In Tara the lease contained a clause which provided that the lessee would pay the royalty interest at the market price at the well. None of the agreements between Teel and the operators contained this language.

¶22 The purchasers and the operator were jointly liable for Teel's gas,²⁰ thus the recovery is limited to the amount, if any, which exceeds the balance in the escrow account.

¶23 Insofar as the argument of unjust enrichment is concerned, before a party may recover unjust enrichment, there must be enrichment to another coupled with a resulting injustice.²¹ The receipt of Teel's oil and gas benefited the purchaser but because Teel will receive at the least the market price of his production, with interest, he has not proven an injustice.²² Additional interest should not be allowed.

¶24 Teel contends he is entitled to recover interest at the rate of six percent per annum on the gas purchased until it was paid into escrow - with the exception that money paid into escrow after July 1, 1980, should draw interest at the rate of 12% under 52 O.S. 1981 § 540 .²³ He charges that if the purchaser earned more than the six percent and twelve percent, respectively, he is entitled to recover additional monies on a unjust enrichment theory.

¶25 Title 52 O.S. 1981 § 540 is inapplicable because it became effective July 1, 1980, after the suit was filed, (1978) and after the court had ordered the funds escrowed (August 9, 1979). Generally, statutes are presumed to operate prospectively. A clear expression of legislative purpose is required to justify a retroactive application, and in the case of doubt, the doubt must be resolved against a retroactive effect.²⁴ Without express legislation, a statute may not be applied retroactively if it alters the rights and duties under an existing contract, especially if the enactment would affect vested rights or the legal character of past transactions would be prejudiced.²⁵ Here, the past transaction between the purchaser and operator would be altered prejudicially, it is, therefore, inapplicable.

¹ Insofar as Teel announces a rule of conversion, it is confined to the peculiar scenario found herein.

² Mann v. State Farm Mut. Auto Ins. Co., 669 P.2d 768, 772 (Okla. 1983); Retherford v. Halliburton Co., 572 P.2d 966, 968 (Okla. 1978).

³ Anderson v. Falcon Drilling Co., 695 P.2d 521, 523 (Okla. 1985); Mann v. State Farm Mut. Auto Ins. Co., see note 2 supra.

⁴ United Engines, Inc. v. McConnell Const., Inc., 641 P.2d 1101, 1105 (Okla. 1981); Tara Oil Company v. Kennedy & Mitchell, Inc., 622 P.2d 1076-77 (Okla. 1981); Bras v. Gibson, 529 P.2d 982-83 (Okla. 1974).

⁵ United Engines, Inc. v. McConnell Const. Inc., see note 3 supra; Berry v. Empire Indem. Ins. Co., 634 P.2d 718, 720 (Okla. 1981); Marshall v. Marshall, 364 P.2d 891, 895 (Okla. 1961).

⁶ Bras v. Gibson, see note 4, supra is distinguishable. In Bras, the appellant accepted the judgment from his adversary and then appealed the judgment. In this case, Teel accepted the escrow account from the operator not the purchasers. He did not include the operator in this appeal. He is appealing the judgment which concerns the purchasers. See also Unterkircher v. Adams, 714 P.2d 193 (Okla. 1985).

⁷ De Mik v. Cargill, 485 P.2d 229, 233 (Okla. 1971); Dilworth v. Fortier, 405 P.2d 38, 49 (Okla. 1964); Harper v. Ford, 317 P.2d 210, 214 (Okla. 1957); Coal Oil and Gas Company v. Styron, 303 P.2d 965, 969 (Okla. 1956); Mershon v. Essley, 204 Okl. 660, 233 P.2d 293, 297 (1951); Earp v. Mid-Continent Petroleum Corp., 167 Okl. 86, 27 P.2d 855, 858, 91 A.L.R. 188 (1933).

⁸ Essley v. Mershon, 262 P.2d 417, 420 (Okla. 1953); Earp v. Mid-Continent Petroleum Corp., see note 7 supra. See also, Reynolds, "Co-ownership of Property in Oklahoma," 27 Okla.L.Rev. 585, 605 (1974).

⁹ Britton v. Green, 325 F.2d 377, 383 (10th Cir. 1963); Eagle-Picher Co. v. Mid-Continent Lead & Zinc Co., 209 F.2d 917, 919 (10th Cir. 1954); Taylor v. Brindley, 164 F.2d 235, 240 (10th Cir. 1947). Young v. West Edmond Hunton Lime Unit, 275 P.2d 304, 309 (Okla. 1954); See also 6 Williams and Meyers, "Oil and Gas Law", p. 868-69, § 990 (1984).

¹⁰ Ellis, "The Production of Gas from Joint Interest Properties," 21st Southwestern Legal Foundation on Oil and Gas Law and Taxation, p. 47, 80 (1970); Note, "Oil and Gas: Production Imbalance in Split Stream Gas Wells - Getting Your Fair Share," 30 Okla.L.Rev. 955, 966 (1977). See also Beren v. Harper Oil Co., 546 P.2d 1356, 1358 (Okla. App. 1975).

¹¹ 4 Williams and Meyers, see note 9, supra; at p. 571-72 § 701 Note, "Oil and Gas Production Imbalance in Split Stream Gas Wells - Getting Your Fair Share", see note 10, supra; Hemingway, "The Law of Oil and Gas," p. 3632-63, § 7.5 (2nd Ed. 1983).

¹² Masterson, "Division Order Problems Created by Apportionment of Royalty", 10 Okla.L.Rev. 289 (1957).

¹³ 4 Williams and Meyers, see note 11, supra.

¹⁴ See 1 Kuntz, "Oil and Gas", p. 242-43, § 11.2 (1962), which states:

¹⁵ With this knowledge PSO continued to purchase the gas and was not a purchaser in good faith. Texas Co. v. Pettitt, 107 Okla. 243, 220 P. 956, 959 (1923). PSO's purchases, coupled with its knowledge, amounts to bad faith and constitutes an action in tort. Stizel-Weller Distillery v. Norman, 39 F. Supp. 182, 187 (W.D.Ky. 1941). The distinguishing factor between Moody v. Wagner, 167 Okla. 99, 23 P.2d 633, 637 (1933) and Teel is the nonconsenting cotenant did not revoke the operator's authority; instead he relied on the operator's production to extend his lease.

¹⁶ See note 14, supra.

¹⁷ Damages are provided in 23 O.S. 1981 § 64 :

¹⁸ Neither party complains of the trial court's denial of trial by jury in the conversion action. On remand, a waiver of trial by jury is not binding on the subsequent trial, if the right to trial by jury is otherwise applicable. Seymour v. Swart, 695 P.2d 509, 512 (Okla. 1985).

¹⁹ Hays v. Phoenix Mutual Life Ins. Co., 391 P.2d 214, 216 (Okla. 1964); Doss Oil Royalty Co. v. Lahman, 302 P.2d 157, 161 (Okla. 1956); Elliott v. Berry, 206 Okl. 594, 245 P.2d 726, 729 (1952).

²⁰ Probst v. Bearman, 76 Okla. 71, 183 P. 886, 888 (1919).

²¹ Efco Importers v. Halsobrunn, 500 F. Supp. 152, 157 (E.D.Pa. 1980); Sachs v. Continental Oil Co., 454 F. Supp. 614, 619 (E.D.Pa. 1978).

²² See note 14, supra.

²³ Title 52 O.S. 1981 § 540 provides in pertinent part:

²⁴ Hammons v. Muskogee Medical Center Authority, 697 P.2d 539, 542 (Okla. 1985); Trinity Broadcasting Corp. v. Leeco Oil Co., 692 P.2d 1364, 1366 (Okla. 1984); Wickham v. Gulf Oil Corp., 623 P.2d 613, 615 (Okla. 1981); Wilson v. State ex rel. Okla. Tax Com'n, 594 P.2d 1210, 1212 (Okla. 1979).

²⁵ Wickham v. Gulf Oil Corp., see note 24, supra; Oklahoma Water Res. Bd. v. Central Okla. M.C. Dist., 464 P.2d 748, 755 (Okla. 1969); Washabaugh v. Bartlett Collins Glass Co., 177 Okla. 159, 57 P.2d 1162, 1164 (1936). See also Anderson v. Dewey, 82 Idaho 173, 350 P.2d 734, 738 (1960); Lake v. Bonynge, 161 Cal. 120, 118 P. 535, 540 (1911).