FILE - In this Friday, April 12, 2013 file photo, a KBR gas plant is pictured near Calumet, Okla. An attorney told a state Supreme Court referee Tuesday that a state law that sets Oklahoma's tax on ... more 
FILE - In this Friday, April 12, 2013 file photo, a KBR gas plant is pictured near Calumet, Okla. An attorney told a state Supreme Court referee Tuesday that a state law that sets Oklahoma's tax on oil and gas production is unconstitutional. (AP Photo/Sue Ogrocki, File) less 
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Associated Press | Photo By Sue Ogrocki, File
Tue, Jul 29, 2014 1:48 PM EDT