View of a jack pump at an oil well
Numéro d’image : 11889965
| Oil pump. View of a pump,known as a jack pump or a "nodding donkey",at an oil well. The pump draws oil out of the ground through a series of non- return valves (not seen here). Newly-drilled oil wells often contain oil at a high enough pressure to force the fluid out without pumping. As the oil is removed,the pressure falls. For a time,the pressure can be maintained by pumping water or air into the subterranean reservoir of oil. Eventually the pressure falls further and a jack pump is required to bring oil out at an economic rate. Even using jack pumps,generally only 30-50 per cent of the oil can be extracted. Photographed in Welton,Lincolnshire,England | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Knapton, Chris |
| Taille de l’image : | 4368 px × 4357 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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