Lubrication channel, 6 letters
There Will Be Blood site, 7 letters
Crude construction?, 7 letters
One of Rockefeller's many, 7 letters
Permian Basin sight, 7 letters
Petroleum source, perhaps (3,4), 7 letters
Catastrophe seen in There Will Be Blood, 11 letters
Texas tea producers, 8 letters
Black gold producers, 8 letters