Опубликовано в "Альтернативный", язык - English. 40 страниц.
Edwin Drake completed the very first rig in 1859 in Pennsylvania. Though the depth was only 69.5 feet this rig launched the modern oil industry. The first well was producing 20 barrels a day. For those of us who are not familiar with drilling methods in the oil industry this issue introduces some basic information about how modern Еще
