pile of helmets

abstract accept action alarm alert allowed anchor appointment authorized backdrop background backgrounds barrel bbl books bowels brent bright building business casque color concept construct construction crude danger development energy equipment guaranteed guarded hazard healed heap helm helmet maintained manual mineral objects oil opec passed petroleum plant plastic protected regenerated related requirement rescued risk running safe safeguarded safeness safety salvaged secure security shielded sign site slam stack stuff subsoil symbol technology threat toil undamaged unionalls unthreatened untouchable valid view von