Oilfields

1 clue
Drilling sites
Similar answers:
Airfields
Battlehatfields
Bookershields
Brookeshields
Brookshields
Chesterfields
Copperfields
Cornfields
Corporatefields
Couponyields
Debbifields
Diamondfields
Dorothyfields
Fields
Fieldsaquestion
Fieldsmedal
Fieldsmedals
Fieldsofgold
Fieldsofstudy
Fieldsquestions