Should Santa Claus require an alternative to reindeer power for his sled, two Texas energy partnerships might be able to provide some assistance.

Andrews Kurth, Bracewell & Giuliani and Vinson & Elkins are advising on two big energy industry deals announced Monday: Regency Energy Partners’ roughly $1.3 billion buy of two Texas pipeline systems and Kinder Morgan Energy Partners’ nearly $1 billion purchase of two tanker companies that transport crude oil.