SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Oil industry research. Oil prospectors carrying out tests for oil. They are employees of the Schlumberger geological prospecting company. The tests will help determine the quantity and quality of the oil. Photographed in the Priobsky oil field, in the Khanty-Mansi region of Western Siberia, Russia. Photographed in 2006.
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