Turnkey (drilling) : A type of a drilling contract. Once it meant the entire job, beginning to end, and often to ready-to-produce for a set price, however, the term has numerous meanings as defined by individual contracts
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}