Oil pump at an oil well. This machine is commonly known as a nodding donkey or jack pump. It is used to draw crude oil from a well. Jack pumps are used when the pressure difference in the well is not sufficient for the oil to flow to the surface of its own accord. Photographed in Lodgepole,Alberta,Canada | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Bond, Martin |
Taille de l’image : | 4635 px × 3850 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |