Photo de stock - Liquid is pumped into the drill hole with high pressure in order to crack open pores and seams at the oil field of Canadian petroleum company Entral European Petroleum CEP in Saal, Germany, 16 June 2014. After this 'stimulation' the oil, which is trapped in layers of stone, could flow into the drilling hole for decades. Photo: BERND WUESTNECK/DPA | usage worldwide. - Saal/Germany

Photo de stock: Liquid is pumped into the drill hole with high pressure in order to crack open pores and seams at the oil field of Canadian petroleum company Entral European.

Mots-clés utilisés

Choisir des mots clés multiples