Jack pump (also known as a nodding donkey) at an oil well. Jack pumps are used for oil extraction where the natural pressure in the oil well is too low to force oil out at an economic rate. Such pumps are now becoming less frequently used as new recovery techniques are developed. Photographed near Denver,Colorado,USA,with the snow-capped Rocky Mountains in the background | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / West, Jim |
Bildgröße: | 5800 px × 3023 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |