Intersection 1 : Occurs when two wellbores meet at a common point, usually happens when a drilling bit or drill stem contacts the casing of a previously drilled well. (Bul D20)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}