HOUSTON, Dec 4 (Reuters) – Deer Park Refining LP, a Shell Oil Co.-Pemex joint venture, said on Monday the company’s 340,000 barrel per day (bpd) Deer Park, Texas, refinery plans to restart its gasoline-producing catalytic cracking unit by the end of this week.The alkylation unit connected to the cat cracker is up and running, said refinery spokesman David McKinney.Both units were shut when Deer Park began repairs on the cat cracker Nov. 4. The cat cracker repairs are finished, McKinney said.Current plans call for the feedstock to be loaded into the CCU by Wednesday and the unit operating normally by Friday or Saturday, he said.Deer Park is a 50-50 joint venture between Mexico’s national oil company, Pemex, and Shell Oil Co., the U.S. unit of Royal Dutch Shell Plc.The Deer Park refinery is the sixth largest in the United States.