barrel

base

biofuel

building

conduit

construction

contemporary

crude

duct

energy

engineering

equipment

extraction

factory

field

fossil

fuel

gas

gasoline

heavy

industrial

industry

line

manufacturing

materials

mineral

mining

oil

oilfield

petrochemical

petrol

petroleum

pipeline

piping

plant

power

processing

production

pumping

raw

refinery

resources

station

storage

structure

tank

technology

tubing

valve

well