The Soviet Union has resumed drilling at the world's deepest hole on the Kola Peninsula west of Murmansk. A Tass report said a rock sample has been recovered from a depth of 12,070 m (39,599 ft). Drilling in the Kola SG-3 well was suspended in December 1983 at 39,586 ft. Moscow said drilling was stopped to install more powerful rig components "and to enable scientists to conduct a number of experiments." Casing was run to nearly 9,000 m (29,527 ft). Casing of 245 mm diameter was

In order to access this content, you must be logged-in and have an active subscription to the OGJ Premium Archive


More in Exploration & Development