Set of oil and gas industry silhouettes. Oil refinery, offshore sea oil drilling rig, land oil drilling rig, oil pumpjack, barrel and railroad oil tank. Vector illustration. Shutterstock .eps vector - Set of oil and gas industry silhouettes. Oil refinery, offshore sea oil drilling rig, land oil drilling rig, oil pumpjack, barrel and railroad oil tank. Vector illustration. - ID: 391558414