DRILLING RIG Russian patent published in 1996 - IPC

FIELD: mining industry. SUBSTANCE: drilling rig has horizontal frame which one end carries pairs of hinged joints and brackets and the other end carries additional pairs of hinged joints and brackets put in symmetry to lateral symmetry axis. Main and additional brackets are mounted on internal side relative to lateral axis. Each end of guide carries identical cross-piece. One crosspiece is hinged to one of hinged joints and the other one - to separable brace or another hinged joint. Braces have variable length, are manufactured separable and are mounted for articulated joint with one of brackets of frame. EFFECT: expanded application field for vertical drilling. 2 cl, 7 dwg