Fill and Sign the Exhibit 21 Purchase and Sale Agreement Form

ASSIGNMENT AND BILL OF SALE (All Assignor's Interest in Multiple Producing Leases) State: County: Assignor: (Name and Address) Assignee: (Name and Address) Effective Date: For adequate consideration, Assignor, named above, assigns, sells and conveys to Assignee, named above, all of Assignor's rights, title, and interests in the Oil and Gas L eases (the "Leases") and lands (the "Lands") described in Exhibit "A" to this Assignment, together with all of Assignor's rights, title, and interests in all wells located on the Lands. Exhibit "A" is incorporated into this Assignment for all purposes. It is the Assignor's intent to assign Assignee all of Assignor's interests in the Leases and Lands, whether or not such interests, Lease s, and Lands are accurately described in Exhibit "A," including all of Assignor's rights and interests in the following, all of which are referred to in this Assignment collectively as the "Properties": 1. Assignor's leasehold interests in oil, gas, and other minerals, including working interests, carried working interests, net profits interests, rights of assignment and reassignment, and all other rights and interests in the Leases. 2. All fee interests in oil, gas, and other minerals, including rights under mineral de eds, conveyances, options, and assignments. 3. All royalty interests, overriding royalty interests, production payments, rights to take royalties in kind, and all other interests in and/or payable out of production of oil, gas, a nd other minerals. 4. All rights and interests in or derived from unit agreements, orders and decisions of state and federal regulatory authorities establishing units, joint operating agreements, enhance d recovery agreements, waterflood agreements, farmout and farmin agreements, options, drilling agreements, unitization, pooling and communitization agreements, oil and/or gas sales agreements, processing agreements, gas gathering and transmission agreements, gas balancing agreements, salt water disposal and injection agreements, assignments of operating right s, subleases, and any and all other agreements to the extent they pertain to the L eases, Lands, and the wells located on the Leases. 5. All rights of way, easements, surface fees, surface leases, servitudes and franchises insofar as they pertain to the Leases and the wells located on the Leases. 6. All permits and licenses of any nature, owned, held, or operated by Assignor in connection with the Leases, Lands and the wells located on the Leases. 7. All producing, nonproducing, and shut-in oil and gas wells, salt water disposal wells, water wells, injection wells, and all other wells on or attributable to the Leases, whether or not identified in the Exhibit to this Assignment. 8. All pumping units, pumps, casing, rods, tubing, wellhead equipment, separators, heater treaters, tanks, pipelines, gathering lines, flow lines, valves, fittings and all other surfa ce and downhole equipment, fixtures, related inventory, gathering and treating facilities, persona l property and equipment used in connection with the Leases and the wells located on t he Leases and all other interests described above. This Assignment is made by Assignor and accepted by Assignor and accepted by Assignee with warranty of title by, through, and under Assignor and not otherwise. It shall be deemed effective, for all purposes, as of the Effective Date stated above. Assignor [Exhibit "A": Description of Leases and Lands]