JR gets back Ewing 6

Betting that this well was going to make him a very rich man, Cliff asked Sue Ellen to marry him. Her loving request to for a little time to think things over led him to believe that there was a very good chance that she'd accept.
Cliff was completely flabbergasted when JR walked into his office one day, grinning from ear to ear, and announced that he had tricked Cliff into buying a dry hole. When Cliff cited the geological reports, JR said they were fake. Cliff was stunned and redoubled drilling efforts for a short while, but then finally accepted the fact that he had been swindled out of $4,500,000.
He was now frantic because the loss of $4,000,000 could put Wentworth Tool & Die out of business and, not knowing where to turn, he went to Sue Ellen to borrow the money to pay back the company. She blew up and threw him out, along with his proposal of marriage. Then JR showed up and offered to buy Barnes-Wentworth #1 back from Cliff for $4,000,000, which he could in turn pay back to Wentworth Tool & Die. Cliff had no choice but to sell the field, although it was worth much, much more. He had lost all of his own money and his mother's respect. Regardless of the fact that he paid back the money he had borrowed from Wentworth Tool & Die, Rebecca fired him.