advantage

balance

barrel

black

business

construction

crude

derrick

diesel

domination

donkey

drilling

ecology

economy

energy

equipment

exploration

extract

extraction

facility

fossil

fuel

gas

gasoline

global

industrial

industry

jack

machine

mineral

mining

money

oil

oilfield

outdoors

petroleum

pipe

pipeline

platform

power

production

pump

pumping

resource

rocking

sky

storage

technology

unit

well