Hostile Environment (well) : High temperature, deep, high pressure or highly corrosive or erosive producing environments (e.g.: depth >20,000ft or 6100m, temp > 325o F or 163oC, pressure >20,000 psi, H2S or CO2 content)
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}