METHOD OF MAKING HOLE CORRECTED IN DIRECTION Russian patent published in 1998 - IPC

FIELD: construction and construction equipment, mainly, hole making of service lines. SUBSTANCE: method is based on use of devices having exterior part of working member of noncircular configuration and forming the hole of noncircular shape. Hole shape components serve as a guide in successive introduction into it device without deflecting member, device with deflecting member, and also device measuring the hole direction and giving the information for correction for possible turn of guides themselves. In so doing, provision is made for strict preset position of working device at its approach to blind end of hole before beginning of work that is the base of increase of reliability and accuracy in correction of direction of hole sinking. EFFECT: higher efficiency. 4 cl, 8 dwg